Green Lentil and Vegetable Casserole (Printable)

Protein-rich green lentils baked with seasonal vegetables, aromatic herbs, and a golden cheese topping.

# What You 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 & 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 or to taste

→ Topping

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

# How To Make It:

01 - Set oven to 375°F and allow to reach temperature.
02 - 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.
03 - Heat olive oil in a large skillet over medium heat. Sauté onion and garlic for 2-3 minutes until fragrant.
04 - Add carrots, zucchini, bell pepper, and mushrooms. Cook, stirring occasionally, for 5-7 minutes until vegetables begin to soften.
05 - Stir in cherry tomatoes, spinach, thyme, oregano, smoked paprika, salt, and black pepper. Cook for another 2-3 minutes until spinach wilts.
06 - Transfer cooked lentils and sautéed vegetables to a large mixing bowl and mix thoroughly to combine.
07 - Transfer mixture to a greased 2-quart baking dish. Sprinkle with Parmesan cheese and breadcrumbs if using.
08 - Bake uncovered for 20-25 minutes until the top is golden and the casserole is bubbling.
09 - Allow casserole to rest for 5 minutes before serving.

# Expert Tips:

01 -
  • It's genuinely filling without feeling heavy: The green lentils give you real protein and fiber, so you won't be hunting for a snack two hours later.
  • One casserole dish means minimal cleanup: Everything bakes together, which means fewer pans to wash and more time to enjoy your meal.
  • It tastes even better the next day: The flavors deepen overnight, making it perfect for meal prep or unexpected guests.
02 -
  • Don't skip the rinsing step with the lentils: Unrinsed lentils can make the broth cloudy and affect the final texture—I learned this when my first batch turned gritty.
  • The vegetables should be cut to similar sizes: Uneven pieces mean some cook while others stay crunchy, and there's nothing worse than biting into a raw carrot chunk in an otherwise perfect casserole.
03 -
  • Don't stir the casserole while it's baking: Resist the urge to peek too often or mix it around—you want that golden top to develop undisturbed.
  • Taste the lentil cooking liquid before draining: If it's flavorful, save a little to stir back in at the end; if it tastes thin or bland, drain it all away and rely on the vegetable broth flavor instead.
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