Green Lentil and Vegetable Casserole

Featured in: Oven-Based Favorites

This satisfying one-dish meal brings together tender green lentils and a colorful medley of vegetables including onions, carrots, zucchini, bell peppers, mushrooms, cherry tomatoes, and fresh spinach. Seasoned with aromatic thyme, oregano, and smoked paprika, the casserole develops deep flavors as it bakes with a golden crust of Parmesan and breadcrumbs. Ready in just over an hour, this vegetarian and gluten-free main offers complete nutrition with 16 grams of protein per serving.

Updated on Wed, 28 Jan 2026 08:42:00 GMT
Freshly baked Green Lentil and Vegetable Casserole with a golden Parmesan breadcrumb crust, served steaming in a rustic dish. Save
Freshly baked Green Lentil and Vegetable Casserole with a golden Parmesan breadcrumb crust, served steaming in a rustic dish. | saborzitoune.com

I spent a rainy Tuesday staring at a bag of green lentils wondering how to make them feel like a warm hug. The kitchen was quiet except for the sound of rain hitting the window and my knife rhythmically chopping carrots. This casserole was born from a need for something deeply grounding yet bright with garden vegetables. It turned out to be the exact kind of meal that makes you want to curl up on the sofa with a big bowl.

One evening while this was bubbling away in the oven the smoky scent of paprika filled the entire house. My roommate came home from work and immediately asked what smelled like a cozy autumn campfire. We ended up eating straight from the baking dish while catching up on our day. It has since become our go to meal for those nights when we both need a little extra kindness.

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Ingredients

  • Green Lentils: These hold their shape perfectly and provide a wonderful nutty base for the vegetables.
  • Vegetable Broth: Using a high quality broth infuses the lentils with deep savory flavor from the inside out.
  • Carrots and Zucchini: These add a natural sweetness and a pop of color that brightens the earthy tones.
  • Smoked Paprika: This is the secret ingredient that gives the whole dish a subtle wood fired depth.
  • Parmesan Cheese: It creates a salty golden crust that pulls the whole vegetable medley together.

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Instructions

Simmering the base:
Combine your rinsed lentils with broth in a pot and let them gently bubble until they are tender. Ensure they stay firm enough to hold their shape after the second round of cooking in the oven.
Softening the aromatics:
Sauté the onion and garlic in olive oil until they smell incredible and turn translucent in the pan. This creates a sweet and savory foundation for the rest of your vegetables.
Building the garden:
Toss in the carrots and zucchini and cook them just until they start to yield to the heat. You want them to soften slightly but still retain their vibrant colors.
Wilting the greens:
Fold in the spinach and tomatoes at the very end so they stay juicy and bright. The heat from the other vegetables will be enough to wilt the spinach in just a few minutes.
The final assembly:
Mix the cooked lentils and sautéed vegetables together before spreading them into your favorite greased baking dish. Make sure the mixture is level so the topping can brown evenly.
The golden finish:
Sprinkle on the cheese and breadcrumbs then bake until the edges are bubbling and the top is crisp. Let the dish rest for a moment so the flavors can fully settle before you serve it.
A close-up view of a hearty Green Lentil and Vegetable Casserole, loaded with colorful carrots, peppers, and wilted spinach. Save
A close-up view of a hearty Green Lentil and Vegetable Casserole, loaded with colorful carrots, peppers, and wilted spinach. | saborzitoune.com

I remember bringing this to a potluck where everyone else brought heavy meat dishes. People kept coming back for seconds of these lentils because they were so unexpectedly light yet filling. It was the first time I realized how much people truly appreciate a well seasoned vegetable dish.

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Choosing the Perfect Lentils

Picking the right variety of lentil makes all the difference in the final texture of your meal. Brown lentils tend to break down too much while red lentils will completely dissolve into a puree. Green lentils or French Puy lentils are the champions here because they stay firm even after an hour of cooking. They provide a satisfying bite that mimics the heartiness of a traditional meat casserole.

Adapting to the Seasons

This recipe is incredibly forgiving and acts as a canvas for whatever is currently available at the market. In the autumn I often swap the zucchini for roasted butternut squash or chunks of sweet potato. If you find yourself with a surplus of kale it makes a fantastic substitute for the spinach as long as you remove the tough stems. The key is to keep the proportions of vegetables to lentils roughly the same to ensure everything bakes evenly.

Ideas for Serving and Storage

While this casserole is a complete meal on its own I love serving it with a few simple sides to round out the experience. A crusty loaf of bread is essential for soaking up any juices at the bottom of the bowl. I also find that a crisp green salad with a sharp lemon vinaigrette cuts through the richness of the lentils beautifully.

  • Add a dollop of Greek yogurt or sour cream on top for a creamy finish.
  • Try a drizzle of high quality balsamic glaze just before serving to add a touch of acidity.
  • Store any leftovers in an airtight container for a lunch that tastes even better the next day.
Spoon lifting a savory portion of Green Lentil and Vegetable Casserole, revealing tender lentils and chunky roasted vegetables. Save
Spoon lifting a savory portion of Green Lentil and Vegetable Casserole, revealing tender lentils and chunky roasted vegetables. | saborzitoune.com

This humble lentil bake is a reminder that simple ingredients can create the most memorable meals. I hope it brings as much warmth to your table as it has to mine.

Recipe FAQs

Can I make this casserole ahead of time?

Yes, assemble the entire dish up to 24 hours in advance and refrigerate. Add 10-15 minutes to the baking time if baking cold from the refrigerator.

What vegetables work best in this casserole?

Root vegetables like sweet potatoes, butternut squash, or parsnips work beautifully. Leafy greens such as kale or Swiss chard can replace spinach. Adjust cooking times for harder vegetables accordingly.

How do I store leftovers?

Store in an airtight container in the refrigerator for up to 4 days. Reheat in a 350°F oven for 15-20 minutes or microwave individual portions until heated through.

Can I freeze this casserole?

Yes, freeze before baking for best results. Wrap tightly and freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.

What can I serve with this casserole?

A crisp green salad with vinaigrette balances the hearty textures. Crusty gluten-free bread, roasted potatoes, or steamed green beans make excellent sides. A light red wine like Pinot Noir complements the earthy flavors.

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Green Lentil and Vegetable Casserole

Protein-rich lentils baked with seasonal vegetables, herbs, and golden Parmesan topping for wholesome comfort.

Prep time
20 minutes
Time to cook
50 minutes
Overall time
70 minutes
Created by Lucinda Wolfe


Skill level Easy

Cuisine International

Makes 4 Portions

Dietary details Suitable for vegetarians

What You'll Need

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

How To Make

Step 01

Preheat oven: Set oven temperature to 375°F.

Step 02

Cook lentils: Combine lentils and vegetable broth in a medium saucepan. Bring to boil, reduce heat, and simmer uncovered for 20-25 minutes until lentils are tender but not mushy. Drain 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 vegetables: Add carrots, zucchini, bell pepper, and mushrooms. Cook, stirring occasionally, for 5-7 minutes until vegetables begin to soften.

Step 05

Add tomatoes and seasonings: 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 ingredients: Transfer cooked lentils and sautéed vegetables to a large mixing bowl. Mix well to combine.

Step 07

Assemble casserole: Transfer 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.

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Tools Needed

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

Allergy details

Double-check each ingredient for allergens and ask your healthcare provider with any concerns.
  • Contains milk from Parmesan cheese.
  • May contain gluten in breadcrumbs.
  • Always check ingredient labels for potential allergens.

Nutrition info (per portion)

Nutrition details are just for reference and can't replace advice from a doctor.
  • Energy (kcal): 320
  • Fat content: 8 grams
  • Carbohydrates: 48 grams
  • Proteins: 16 grams

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