High-Protein Cheesy Beef & Bell Pepper Casserole

ByHannah Peterson

This hearty, cheesy casserole loaded with seasoned ground beef and colorful bell peppers. It’s a flavorful, one-dish meal that’s high in protein, low in carbs, and ideal for family dinners or meal prep.

Why You’ll Love This Recipe

  • Very high protein from beef and cheese
  • Low carb and keto-friendly (no rice or beans)
  • One-pan easy with bold fajita-inspired flavor
  • Make-ahead and freezer-friendly
  • Customizable heat level and veggie mix

Ingredients (Serves 6)

  • 2 lbs (900g) ground beef
  • 3–4 bell peppers (red, green, yellow), chopped
  • 1 medium onion, diced
  • 3–4 cloves garlic, minced
  • 1 cup (240ml) sugar-free tomato sauce or salsa
  • 2 cups (200g) shredded Mexican blend or cheddar cheese (divided)
  • 2 tsp chili powder
  • 1 tsp cumin
  • 1 tsp paprika
  • ½ tsp oregano
  • Salt & black pepper to taste
  • 2 tbsp olive oil or avocado oil
  • Optional: jalapeños or red pepper flakes for heat, fresh cilantro for garnish

Instructions

  1. Preheat oven to 375°F (190°C). Lightly grease a 9×13 glass baking dish.
  2. Heat oil in a large skillet over medium-high heat. Add onion and cook 2–3 minutes. Add garlic and ground beef; cook until browned, breaking it up (6–8 minutes). Drain excess fat if needed.
  3. Stir in chopped bell peppers, tomato sauce/salsa, chili powder, cumin, paprika, oregano, salt, and pepper. Cook 4–5 minutes until peppers start to soften.
  4. Transfer mixture to the baking dish. Top evenly with 1½ cups shredded cheese.
  5. Bake 15–20 minutes until cheese is melted and bubbly. Broil for the last 2 minutes for extra golden browning if desired.
  6. Let rest 5 minutes. Garnish with fresh cilantro and serve.

Prep Time: 10 minutes Bake Time: 20 minutes Total Time: 30 minutes

Nutrition (Per Serving)

  • Calories: ~410
  • Protein: 38g (very high)
  • Total Carbs: 9g
  • Net Carbs: 7g
  • Fat: 26g

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