Hearty Vegan High Protein Casserole (35g Protein, Vegan) – Wholesome & Easy Dinner

This Vegan High Protein Casserole has become a staple in my rotation, delivering on flavor and that essential protein boost without compromising on taste. It’s a true weeknight winner.

Why This Vegan High Protein Casserole Works

This casserole shines because of its intelligent combination of plant-based protein sources.

Ingredients

• 1 tablespoon olive oil
• 1 large yellow onion, finely chopped
• 2 medium carrots, peeled and diced
• 2 celery stalks, diced
• 3 cloves garlic, minced
• 1 cup dried brown or green lentils, rinsed well
• 4 cups vegetable broth
• 1 teaspoon dried thyme
• ½ teaspoon dried rosemary
• Salt and freshly ground black pepper to taste
• 1 ½ cups cooked quinoa (or other cooked grain like farro or brown rice)
• 1 (15-ounce) can black beans, rinsed and drained
• 1 (15-ounce) can corn, drained (frozen is fine, thawed)
• ¾ cup unsweetened plant-based milk (soy or almond work well)
• ¼ cup nutritional yeast
• 2 tablespoons cornstarch or all-purpose flour (for thickening)
• 1 tablespoon Dijon mustard
• 1 cup broccoli florets, lightly steamed or blanched (optional, for added color and nutrition)
• ½ cup shredded vegan cheddar cheese (optional, for topping)

Gathering these ingredients is the first step to a wonderfully wholesome meal.

How to Make It

1. Sauté the Aromatics: Heat the olive oil in a large, oven-safe skillet or Dutch oven over medium heat.
2. Add Garlic and Spices: Stir in the minced garlic and cook for another minute until fragrant, being careful not to burn it.
3. Simmer the Lentils: Add the rinsed lentils and vegetable broth to the skillet.
4. Incorporate Quinoa and Beans: Once the lentils are tender, stir in the cooked quinoa, rinsed black beans, and drained corn.
5. Prepare the Creamy Sauce: In a separate small bowl, whisk together the plant-based milk, nutritional yeast, cornstarch (or flour), and Dijon mustard.
6. Thicken the Casserole: Pour the creamy sauce mixture over the lentil and vegetable base in the skillet.
7. Bake the Casserole: If your skillet is not oven-safe, transfer the mixture to a greased 9×13 inch baking dish.
8. Bake Until Bubbly: Bake in a preheated oven at 375°F (190°C) for 20-25 minutes, or until the casserole is heated through and bubbly around the edges.

This multi-step process ensures all the flavors meld beautifully, resulting in a hearty and cohesive dish.

Nutrition at a Glance

• High in Protein: Approximately 35g per serving, primarily from the lentils, quinoa, and beans, supporting muscle health and satiety.
• Rich in Fiber: The lentils, beans, and vegetables contribute a substantial amount of dietary fiber, aiding digestion and promoting a feeling of fullness.
• Vitamins and Minerals: A good source of iron, folate, potassium, and various B vitamins from the lentils, beans, and vegetables.
• Complex Carbohydrates: Quinoa and lentils provide sustained energy release, making it a great meal for active individuals.
• Lower in Saturated Fat: Compared to many animal-based casseroles, this vegan version is naturally lower in unhealthy fats.

How to Serve It

• As a Hearty Main: Serve generous portions directly from the dish.
• With a Side Salad: A crisp green salad with a light vinaigrette provides a refreshing contrast.
• Alongside Steamed Greens: A simple side of steamed broccoli or spinach adds extra nutrients and color.
• With Crusty Bread: Perfect for sopping up any extra sauce.
• Topped with Fresh Herbs: A sprinkle of fresh parsley or chives adds a burst of freshness.

Serving this dish thoughtfully can elevate the dining experience and add further nutritional value.

Don’t miss this delicious recipe: Mediterranean Braised Chickpea Rice Bowls

Common Mistakes

• Undercooked Lentils: Not simmering the lentils long enough will result in a tough texture. Ensure they are tender before adding other ingredients.
• Over-Salting: Lentils can absorb a lot of salt. Taste and adjust seasoning throughout the cooking process.
• Not Thickening the Sauce: If the sauce is too thin, the casserole won’t hold together.
• Skipping the Resting Time: Allowing the casserole to rest for a few minutes after baking helps it to set, making it easier to serve neat portions.
• Using Old Spices: Stale herbs and spices won’t impart much flavor. Check the freshness of your dried herbs for the best taste.

Being mindful of these details will help ensure a successful and enjoyable outcome.

Storage and Reheating

• Refrigeration: Once cooled, store any leftover casserole in an airtight container in the refrigerator for up to 4-5 days.
• Freezing: This casserole freezes well. Portion it into airtight containers or freezer-safe bags.
• Reheating in Oven: The best method for reheating is in a preheated oven at 350°F (175°C) until heated through, about 15-20 minutes.
• Microwave Reheating: For a quicker option, reheat individual portions in the microwave on medium power, stirring halfway through, until hot.

Caring for your leftovers ensures you can enjoy this flavorful meal again.

Leftover Ideas

• Breakfast Hash: Chop up leftover casserole and sauté it with some diced potatoes and onions for a savory breakfast hash.
• Casserole Stuffed Peppers: Use the leftover filling to stuff bell peppers. Bake until the peppers are tender.
• Savory Pancakes or Waffles: Blend a portion of the leftover casserole with a little extra plant-based milk and flour, then cook like pancakes or waffles for an unusual but delicious savory breakfast.
• Casserole Topping for Potatoes: Serve warm leftover casserole over baked potatoes or sweet potatoes for a quick and satisfying meal.
• Salad Addition: Cool leftovers and add them as a protein-rich topping to a large green salad, perhaps with some corn, salsa, and avocado.

These ideas offer creative ways to enjoy every last bite, minimizing food waste and maximizing flavor.

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