Green Lentil Vegetable Casserole

Featured in: Veggie & Grain Bowls

This satisfying casserole brings together tender green lentils and a colorful medley of vegetables including onions, carrots, celery, bell peppers, zucchini, cherry tomatoes, and mushrooms. The vegetables are first sautéed to develop their flavors, then simmered with lentils in aromatic vegetable broth infused with thyme, oregano, and smoked paprika. After stovetop cooking, the mixture transfers to the oven where it bakes until golden and bubbling, with optional grated cheese adding a savory finish. The result is a protein-packed, fiber-rich dish that's naturally gluten-free and easily made vegan.

Updated on Sat, 24 Jan 2026 22:03:15 GMT
A baked Green Lentil and Vegetable Casserole with golden cheese topping, served in a rustic dish with a fresh parsley garnish.  Save
A baked Green Lentil and Vegetable Casserole with golden cheese topping, served in a rustic dish with a fresh parsley garnish. | shiftoven.com

This Green Lentil and Vegetable Casserole is a wholesome, hearty dish that perfectly balances protein-rich legumes with a colorful medley of seasonal vegetables. Baked until golden and bubbling, it serves as a comforting vegetarian main course that is as nourishing as it is flavorful.

A baked Green Lentil and Vegetable Casserole with golden cheese topping, served in a rustic dish with a fresh parsley garnish.  Save
A baked Green Lentil and Vegetable Casserole with golden cheese topping, served in a rustic dish with a fresh parsley garnish. | shiftoven.com

The secret to this casserole is the aromatic base of sautéed onions, garlic, and Mediterranean herbs. By simmering the lentils with tomato paste and smoked paprika before baking, you create a deep, savory foundation that pairs beautifully with the sweetness of roasted cherry tomatoes and bell peppers.

Ingredients

  • 1 cup (200 g) green lentils, rinsed
  • 3 cups (720 ml) vegetable broth (use gluten-free if needed)
  • 2 tablespoons olive oil
  • 1 large onion, diced
  • 2 garlic cloves, minced
  • 2 medium carrots, diced
  • 2 celery stalks, diced
  • 1 red bell pepper, chopped
  • 1 zucchini, chopped
  • 1 cup (150 g) cherry tomatoes, halved
  • 1 cup (150 g) mushrooms, sliced
  • 1 teaspoon dried thyme
  • 1 teaspoon dried oregano
  • 1 teaspoon smoked paprika
  • 1/2 teaspoon ground black pepper
  • 1/2 teaspoon salt (adjust to taste)
  • 2 tablespoons tomato paste
  • 1 bay leaf
  • 1/2 cup (50 g) grated Parmesan or vegetarian hard cheese (optional)
  • 1/4 cup (15 g) fresh parsley, chopped
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Instructions

Step 1: Prep
Preheat oven to 375°F (190°C).
Step 2: Sauté Aromatics
In a large saucepan, heat olive oil over medium heat. Add onion and garlic, sauté for 3–4 minutes until softened.
Step 3: Add Vegetables
Add carrots, celery, bell pepper, zucchini, mushrooms, and cherry tomatoes. Cook for 5–6 minutes, stirring occasionally, until vegetables begin to soften.
Step 4: Season
Stir in lentils, tomato paste, thyme, oregano, smoked paprika, bay leaf, salt, and pepper. Mix well.
Step 5: Simmer
Pour in vegetable broth and bring to a boil. Reduce heat and simmer uncovered for 20 minutes, stirring occasionally, until lentils are just tender.
Step 6: Transfer
Remove the bay leaf. Transfer the mixture to a large 2-quart ovenproof baking dish.
Step 7: Top
Sprinkle with grated cheese, if using.
Step 8: Bake
Bake uncovered for 25 minutes, until the top is golden and bubbling.
Step 9: Finish
Remove from oven, let rest for 5 minutes, then garnish with fresh parsley before serving.

Zusatztipps für die Zubereitung

Make sure to rinse the green lentils thoroughly before cooking to remove any dust. When simmering, keep an eye on the liquid levels; you want the lentils to be tender but not swimming in broth before they go into the oven. Always remember to remove the bay leaf before the baking stage for the best dining experience.

Varianten und Anpassungen

For a vegan version, simply omit the cheese or use a plant-based alternative. You can easily swap in any seasonal vegetables you have on hand, such as sweet potato, spinach, or kale. For extra depth of flavor, consider adding a splash of balsamic vinegar to the mixture just before transferring it to the baking dish.

Serviervorschläge

This hearty casserole is perfect when served alongside a thick slice of crusty bread to soak up the juices. A fresh green salad with a light vinaigrette also provides a nice crisp contrast to the warm, savory lentils.

A hearty serving of Green Lentil and Vegetable Casserole in a white bowl, showcasing tender lentils and colorful roasted vegetables.  Save
A hearty serving of Green Lentil and Vegetable Casserole in a white bowl, showcasing tender lentils and colorful roasted vegetables. | shiftoven.com

Whether you are serving a family dinner or looking for a reliable meal prep option, this Green Lentil and Vegetable Casserole delivers consistent comfort and nutrition. It is a testament to how simple ingredients can come together to create a truly satisfying vegetarian feast.

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Recipe Q&A

Can I use different types of lentils?

While green lentils work best as they hold their shape during baking, you can substitute brown lentils. Avoid red lentils as they tend to become too soft and mushy for this style of casserole.

How long does this casserole keep in the refrigerator?

Leftovers store well in an airtight container for 4-5 days. The flavors often develop and improve after a day or two. Reheat in the microwave or oven at 350°F until warmed through.

Can I freeze this dish?

Yes, this casserole freezes beautifully. Cool completely, then transfer to freezer-safe containers. It will keep for up to 3 months. Thaw overnight in the refrigerator before reheating.

What vegetables work well as substitutes?

Sweet potato, butternut squash, spinach, kale, eggplant, or green beans all work wonderfully. Use whatever seasonal vegetables you have available, keeping the total quantity similar to the original recipe.

Is this suitable for meal prep?

Absolutely. This casserole is excellent for meal prep. Make it on Sunday and portion into containers for easy lunches throughout the week. It reheats perfectly without losing texture or flavor.

What can I serve with this casserole?

Crusty bread, warm dinner rolls, or a simple green salad complement this dish well. For a heartier meal, serve over cooked rice, quinoa, or mashed potatoes.

Green Lentil Vegetable Casserole

Protein-rich green lentils baked with seasonal vegetables in a savory tomato-herb broth for a comforting vegetarian main dish.

Time to Prep
20 min
Time to Cook
55 min
Overall Time
75 min
Recipe by Samuel Hill


Skill Level Easy

Cuisine European

Makes 4 Portions

Diet Preferences Meat-free, No Gluten

What You Need

Lentils

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

Vegetables

01 2 tablespoons olive oil
02 1 large onion, diced
03 2 garlic cloves, minced
04 2 medium carrots, diced
05 2 celery stalks, diced
06 1 red bell pepper, chopped
07 1 zucchini, chopped
08 1 cup cherry tomatoes, halved
09 1 cup mushrooms, sliced

Seasonings

01 1 teaspoon dried thyme
02 1 teaspoon dried oregano
03 1 teaspoon smoked paprika
04 1/2 teaspoon ground black pepper
05 1/2 teaspoon salt
06 2 tablespoons tomato paste
07 1 bay leaf

Topping

01 1/2 cup grated Parmesan or vegetarian hard cheese (optional)
02 1/4 cup fresh parsley, chopped

Directions

Step 01

Preheat Oven: Preheat oven to 375°F.

Step 02

Sauté Aromatics: In a large saucepan, heat olive oil over medium heat. Add onion and garlic, sauté for 3–4 minutes until softened.

Step 03

Cook Vegetables: Add carrots, celery, bell pepper, zucchini, mushrooms, and cherry tomatoes. Cook for 5–6 minutes, stirring occasionally, until vegetables begin to soften.

Step 04

Add Seasonings: Stir in lentils, tomato paste, thyme, oregano, smoked paprika, bay leaf, salt, and pepper. Mix well.

Step 05

Simmer Lentils: Pour in vegetable broth and bring to a boil. Reduce heat and simmer uncovered for 20 minutes, stirring occasionally, until lentils are just tender.

Step 06

Prepare Baking Dish: Remove the bay leaf. Transfer the mixture to a large ovenproof baking dish.

Step 07

Add Cheese Topping: Sprinkle with grated cheese, if using.

Step 08

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

Step 09

Rest and Garnish: Remove from oven, let rest for 5 minutes, then garnish with fresh parsley before serving.

Tools Needed

  • Large saucepan
  • Ovenproof baking dish (2-quart capacity)
  • Cutting board and knife
  • Stirring spoon

Allergy Details

Review each item to spot allergens, and consult a health expert if unsure.
  • Contains dairy if cheese is used. Omit or use vegan cheese for a dairy-free version.
  • Lentils are legumes; check for sensitivities.
  • Double-check broth and cheese labels for gluten or other allergens if required.

Nutrition (per serving)

For guidance only. Always check with a medical provider for advice.
  • Energy: 320
  • Fats: 8 g
  • Carbohydrates: 47 g
  • Proteins: 16 g