Green Lentil and Vegetable Casserole

Featured in: Everyday Table Meals

This comforting baked dish brings together protein-rich green lentils and a colorful medley of vegetables including onions, carrots, zucchini, bell peppers, mushrooms, cherry tomatoes, and fresh spinach. Seasoned with thyme, oregano, and smoked paprika, the casserole develops deep, savory flavors as it bakes. A sprinkle of Parmesan and optional breadcrumbs creates a golden, crispy topping that adds delightful texture. The entire preparation takes just over an hour, making it perfect for weeknight dinners or meal prep. Naturally vegetarian and easily adaptable for vegan diets, this dish delivers satisfying nutrition with 16 grams of protein per serving.

Updated on Wed, 28 Jan 2026 12:01:00 GMT
Golden-brown Green Lentil and Vegetable Casserole fresh from the oven, featuring bubbly Parmesan and herb topping. Save
Golden-brown Green Lentil and Vegetable Casserole fresh from the oven, featuring bubbly Parmesan and herb topping. | platerelay.com

The first snow of winter had just dusted our countryside home when I discovered this green lentil and vegetable casserole recipe scribbled in an old cookbook borrowed from our neighbor. The kitchen windows fogged as the aromatic herbs filled our home with warmth, drawing my family from their respective corners. Something about the hearty lentils and seasonal vegetables coming together under a golden crust seemed to capture exactly what comfort food should be.

Last autumn, when my sister announced she was trying vegetarianism, I panicked about what to serve for our weekly family dinner. This casserole became my saving grace, winning over even my meat-loving father who suspiciously poked at it before helping himself to seconds and then thirds. Now its requested whenever anyone needs a bit of culinary comfort, vegetarian or not.

Ingredients

  • Green lentils: The foundation of this dish, I learned through trial and error that green lentils hold their shape beautifully while soaking up all those wonderful flavors from the broth.
  • Seasonal vegetables: The colorful medley creates layers of texture and flavor, with each vegetable contributing something unique to the overall harmony.
  • Smoked paprika: Just a half teaspoon transforms the entire dish, adding a subtle smokiness that makes people wonder what your secret ingredient might be.
  • Parmesan cheese: That golden crust that forms on top is worth every calorie, creating a savory barrier that seals in moisture and flavor.

Instructions

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Start with the lentils:
Combine those beautiful green lentils with vegetable broth and let them simmer until tender but still holding their shape. Youll know theyre perfect when they yield to a bite but dont turn to mush.
Create your vegetable symphony:
Heat olive oil until it shimmers, then add your onions and garlic until the kitchen fills with that irresistible aroma. The vegetables should gradually soften but maintain some structure.
Layer the flavors:
When you add the herbs and spices, rub them between your fingers first to release their oils. This little trick intensifies their presence throughout the dish.
Bring it all together:
Mixing the lentils with the sautéed vegetables is my favorite part, watching the colors meld together. Make sure every lentil gets coated in that flavorful vegetable mixture.
Create the golden top:
Sprinkle the Parmesan and breadcrumbs with a light hand across the surface. The uneven application creates those delightful crispy peaks and valleys that make each serving unique.
Bake until bubbling:
Your kitchen will fill with an aroma that draws everyone near. The edges should get slightly caramelized, creating those coveted crispy bits everyone fights over.
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Freshly baked Green Lentil and Vegetable Casserole with vibrant carrots, spinach, and cherry tomatoes on a rustic wooden table. Save
Freshly baked Green Lentil and Vegetable Casserole with vibrant carrots, spinach, and cherry tomatoes on a rustic wooden table. | platerelay.com

One particularly memorable evening, I served this casserole during a power outage, with candles scattered around our dining room. The golden flickers illuminated steam rising from each serving, and something about the simplicity of the moment perfectly matched the honesty of this dish. Conversation flowed easily, without phones or television to distract us, and the wholesome comfort of this meal seemed to encourage vulnerability and connection.

Making It Your Own

While testing this recipe, I discovered its more of a template than a strict rulebook. Ive made it with puy lentils for a more elegant version, and even tried red lentils when my pantry was bare, though they did create a softer texture. The vegetable combination shifts with the seasons in my kitchen, from hearty winter roots to summer garden bounty, and somehow, it always works.

Serving Suggestions

Theres something magical about how this casserole pairs with different accompaniments. A tangy arugula salad cuts through the richness beautifully, while a slice of crusty bread is perfect for soaking up the last bits from your plate. For dinner guests, I sometimes add a poached egg on top of each serving, watching their delight as the yolk creates an instant sauce when broken.

Storage and Reheating

This casserole has saved my weekday lunch situation more times than I can count, as it actually improves after a day in the refrigerator when the flavors have had time to meld. For reheating, I discovered that adding a splash of broth before microwaving prevents it from drying out.

  • Store leftovers in an airtight container in the refrigerator for up to 4 days.
  • Freeze individual portions for up to 3 months for emergency comfort food.
  • Let it come to room temperature before reheating for the most even results.
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Serving of hearty Green Lentil and Vegetable Casserole on a white plate, garnished with fresh thyme and a side salad. Save
Serving of hearty Green Lentil and Vegetable Casserole on a white plate, garnished with fresh thyme and a side salad. | platerelay.com

This humble casserole has taught me that the most nourishing food often comes from simple ingredients treated with care. May it bring the same comfort to your table as it has to mine, gathering loved ones with its honest warmth.

Recipe FAQs

Can I make this casserole ahead of time?

Yes, you can assemble the entire casserole up to 24 hours in advance and refrigerate before baking. Add 5-10 minutes to the baking time if baking cold from the refrigerator.

What vegetables work best in this dish?

The recipe uses carrots, zucchini, bell peppers, mushrooms, cherry tomatoes, and spinach, but you can substitute any seasonal vegetables like sweet potatoes, squash, kale, or eggplant based on availability.

How do I make this vegan?

Simply replace the Parmesan cheese with a vegan alternative or omit it entirely. The casserole is already plant-based and gluten-free when made without traditional breadcrumbs.

Can I freeze leftovers?

This casserole freezes well for up to 3 months. Portion into airtight containers and thaw overnight in the refrigerator before reheating at 350°F until warmed through.

What should I serve with this casserole?

A simple green salad with vinaigrette pairs beautifully to add freshness. Crusty gluten-free bread helps soak up the juices. For wine lovers, a light red like Pinot Noir complements the earthy lentils.

Do I need to soak the lentils first?

No soaking required. Green lentils cook relatively quickly in about 20-25 minutes. Just rinse them thoroughly before simmering in vegetable broth until tender but not mushy.

Green Lentil and Vegetable Casserole

Protein-packed green lentils baked with seasonal vegetables and aromatic herbs for a wholesome, satisfying meal.

Time to Prep
20 minutes
Time to Cook
50 minutes
Total Duration
70 minutes
Created by Henry Foster

Recipe Category Everyday Table Meals

Skill Level Easy

Cuisine International

Makes 4 Portions

Dietary Details Vegetarian-Friendly, No Gluten

Ingredient List

Lentils

01 1 cup dried green lentils, rinsed
02 3 cups vegetable broth

Vegetables

01 1 medium onion, diced
02 2 cloves garlic, minced
03 2 medium carrots, sliced
04 1 medium zucchini, diced
05 1 red bell pepper, diced
06 1 cup button mushrooms, sliced
07 1 cup cherry tomatoes, halved
08 2 cups fresh spinach, roughly chopped

Herbs & Seasonings

01 2 tablespoons olive oil
02 1 teaspoon dried thyme
03 1 teaspoon dried oregano
04 1/2 teaspoon smoked paprika
05 1/2 teaspoon ground black pepper
06 1/2 teaspoon salt

Topping

01 1/3 cup grated Parmesan cheese or vegan alternative
02 1/2 cup gluten-free breadcrumbs, optional

Directions

Step 01

Preheat oven: Set oven to 375°F (190°C).

Step 02

Cook lentils: In a medium saucepan, combine lentils and vegetable broth. Bring to a boil, reduce heat, and simmer uncovered for 20–25 minutes until lentils are tender but not mushy. Drain any excess liquid.

Step 03

Sauté aromatics: Heat olive oil in a large skillet over medium heat. Sauté onion and garlic for 2–3 minutes until fragrant.

Step 04

Cook root vegetables: Add carrots, zucchini, bell pepper, and mushrooms. Cook, stirring occasionally, for 5–7 minutes until vegetables begin to soften.

Step 05

Finish vegetables: Stir in cherry tomatoes, spinach, thyme, oregano, smoked paprika, salt, and black pepper. Cook for another 2–3 minutes until spinach wilts.

Step 06

Combine components: Transfer cooked lentils and sautéed vegetables to a large mixing bowl. Mix well to combine.

Step 07

Assemble casserole: Transfer the mixture to a greased 2-quart baking dish. Sprinkle with Parmesan cheese and breadcrumbs if using.

Step 08

Bake: Bake uncovered for 20–25 minutes, until the top is golden and the casserole is bubbling.

Step 09

Rest and serve: Let rest for 5 minutes before serving.

Equipment Needed

  • Medium saucepan
  • Large skillet
  • Mixing bowl
  • 2-quart baking dish
  • Chef's knife
  • Cutting board

Allergy Advice

Always check every ingredient for potential allergens. Ask your doctor if you're unsure.
  • Contains milk from Parmesan cheese
  • May contain gluten in breadcrumbs
  • Always check ingredient labels for potential allergens

Nutrition Info (per serving)

For reference only—please consult a nutritionist or healthcare provider for dietary advice.
  • Caloric Value: 320
  • Fat Content: 8 grams
  • Carbohydrate: 48 grams
  • Proteins: 16 grams