Green Lentil Vegetable Casserole (Printable)

Protein-rich lentils baked with seasonal vegetables and herbs in a comforting, golden-topped casserole.

# What You'll Need:

→ Lentils

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

→ Vegetables

03 - 1 medium onion, diced
04 - 2 cloves garlic, minced
05 - 2 medium carrots, sliced
06 - 1 medium zucchini, diced
07 - 1 red bell pepper, diced
08 - 1 cup button mushrooms, sliced
09 - 1 cup cherry tomatoes, halved
10 - 2 cups fresh spinach, roughly chopped

→ Herbs and Seasonings

11 - 2 tablespoons olive oil
12 - 1 teaspoon dried thyme
13 - 1 teaspoon dried oregano
14 - 1/2 teaspoon smoked paprika
15 - 1/2 teaspoon ground black pepper
16 - 1/2 teaspoon salt

→ Topping

17 - 1/3 cup grated Parmesan cheese or vegan alternative
18 - 1/2 cup gluten-free breadcrumbs, optional

# Directions:

01 - Preheat oven to 375°F.
02 - In a medium saucepan, combine lentils and vegetable broth. Bring to a boil, reduce heat, and simmer uncovered for 20 to 25 minutes until lentils are tender but not mushy. Drain any excess liquid.
03 - While lentils cook, heat olive oil in a large skillet over medium heat. Sauté onion and garlic for 2 to 3 minutes until fragrant.
04 - Add carrots, zucchini, bell pepper, and mushrooms. Cook, stirring occasionally, for 5 to 7 minutes until vegetables begin to soften.
05 - Stir in cherry tomatoes, spinach, thyme, oregano, smoked paprika, salt, and black pepper. Cook for another 2 to 3 minutes until spinach wilts.
06 - Combine cooked lentils and sautéed vegetables in a large mixing bowl. Mix well to combine.
07 - Transfer the mixture to a greased 2-quart baking dish. Sprinkle with Parmesan cheese and breadcrumbs if using.
08 - Bake uncovered for 20 to 25 minutes, until the top is golden and the casserole is bubbling.
09 - Let rest for 5 minutes before serving.

# Expert Tips:

01 -
  • It's genuinely filling without feeling heavy, which means you can eat a proper portion and feel satisfied for hours.
  • Most of the work happens while you're chopping, leaving the oven to do the hard part.
  • Leftovers taste even better the next day, making it perfect for meal prep or unexpected guests.
02 -
  • Don't overcook the lentils during the initial boil or they'll fall apart in the final casserole and become mushy rather than maintaining their structure.
  • The vegetables release a fair amount of moisture during cooking, so if your broth was especially liquid-heavy, you might need to drain some liquid before combining with the lentils.
03 -
  • Use a heavy-bottomed skillet when sautéing your vegetables so the heat distributes evenly and nothing burns on the bottom while other pieces stay raw.
  • If you're making this for vegans, skip the cheese entirely or use a good quality cashew-based Parmesan that actually melts—the breadcrumb topping becomes even more important for texture.
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