Description
Keto Stuffed Pepper Casserole takes all the comforting flavors of classic stuffed peppers and turns them into an easy, cheesy one-dish dinner. Savory ground beef, colorful bell peppers, cauliflower rice, tomatoes, and Italian-inspired seasonings simmer together before being finished with a golden layer of melted cheese. It’s a satisfying low-carb, high-protein casserole that’s perfect for busy weeknights and meal prep.
Can This Keto Stuffed Pepper Casserole Support Weight Loss Goals?
This casserole can fit into a balanced weight-management eating pattern because it combines protein-rich ground beef with vegetables and cauliflower rice. The vegetables provide volume and fiber while replacing traditional white rice, helping keep carbohydrates more moderate. For a more calorie-conscious version, choose lean ground beef and use a moderate amount of cheese.
Does Keto Stuffed Pepper Casserole Fit a High-Protein Lifestyle?
Yes, this recipe is well suited to a high-protein, low-carb lifestyle. Lean ground beef and cheese provide most of the protein, while bell peppers and cauliflower add fiber and nutrients without relying on traditional rice. One serving contains approximately 9 g net carbs, depending on the brands and vegetables used. For an even higher-protein version, increase the beef or add lean ground turkey.
Why This Recipe Is Special
- Keto-friendly: Cauliflower rice replaces traditional rice.
- High-protein: Ground beef and cheese create a hearty protein base.
- One-dish comfort food: No need to stuff individual peppers.
- Cheesy and satisfying: A bubbling cheese topping finishes the casserole beautifully.
- Meal-prep friendly: It reheats well for quick lunches and dinners.
My Personal Experience
- I love how much easier this is than traditional stuffed peppers.
Everything cooks together, so there is no need to carefully fill individual peppers. - The cauliflower rice blends beautifully into the beef mixture.
It gives the casserole a rice-like texture while keeping the dish lower in carbohydrates. - The colorful peppers make every serving look inviting.
Red, yellow, and green peppers add sweetness, crunch, and vibrant color. - The cheesy top makes it feel like true comfort food.
Baking until the cheese bubbles and turns golden gives the casserole an irresistible finish.
Perfect For
This casserole is ideal for keto dinners, low-carb meal plans, busy weeknights, family dinners, Sunday meal prep, freezer meals, cozy winter dinners, potlucks, and make-ahead lunches.
Why You’ll Love This Recipe
- Easy one-pan preparation: Everything comes together without complicated steps.
- High in protein: Beef provides a substantial protein base.
- Low-carb: Cauliflower rice keeps the dish lighter on carbohydrates.
- Cheesy and comforting: Perfect for satisfying comfort-food cravings.
- Customizable: Easily change the meat, vegetables, spices, or cheese.
- Great leftovers: The flavors become even more developed the next day.
Common Mistakes to Avoid
- Using watery cauliflower rice: Excess moisture can make the casserole soggy; squeeze thawed frozen cauliflower rice very well.
- Skipping the browning step: Properly browned beef develops much more flavor.
- Adding too much tomato sauce: Excess liquid can prevent the casserole from setting.
- Cutting peppers too large: Smaller pieces cook more evenly and blend better with the beef.
- Overbaking: Once the cheese is melted and bubbling, remove the casserole to prevent the vegetables from becoming mushy.
Required Equipment
- Large oven-safe skillet — Lets you cook and bake the casserole in the same pan.
- Wooden spoon — Makes breaking up the ground beef easy.
- Sharp chef’s knife — Quickly chops the peppers and onion.
- Box grater — Makes freshly shredded cheese that melts smoothly.
- Colander — Helps drain excess liquid from cauliflower rice and canned tomatoes.
Storage Instructions
Allow leftovers to cool before transferring them to airtight containers. Refrigerate for up to 4 days.
For longer storage, portion the casserole into freezer-safe containers and freeze for up to 2–3 months. Thaw overnight in the refrigerator before reheating.
Reheat individual portions in the microwave for 2–3 minutes, stirring halfway through, or warm the casserole covered in a 350°F (175°C) oven for 15–20 minutes.
Recipe Details
- Preparation Time: 15 minutes
- Cooking Time: 35 minutes
- Total Time: 50 minutes
- Servings: 6
- Best Season: All-season
- Total Calories: Approximately 390 calories per serving
Short 3-Line Description
Savory ground beef, colorful bell peppers, cauliflower rice, tomatoes, and Italian seasonings come together in one comforting casserole.
A generous layer of melted cheese creates a bubbling, golden finish.
This easy keto-friendly dinner is high in protein, low in carbs, and perfect for meal prep.
📝 Ingredients
For the Casserole
- 1 1/2 lb (680 g) lean ground beef, 90% lean
- 1 tbsp olive oil
- 1 medium yellow onion, diced
- 1 red bell pepper, diced
- 1 green bell pepper, diced
- 1 yellow bell pepper, diced
- 3 cloves garlic, minced
- 3 cups (450 g) cauliflower rice, fresh or frozen
- 1 can (14.5 oz/411 g) diced tomatoes, drained
- 1/2 cup (120 g) low-sugar tomato sauce
- 1 tbsp tomato paste
- 1 tsp Italian seasoning
- 1 tsp smoked paprika
- 1 tsp dried oregano
- 1/2 tsp garlic powder
- 1/2 tsp salt, or to taste
- 1/2 tsp black pepper
- 1/4 tsp red pepper flakes, optional
For the Cheese Topping
- 1 cup (100 g) shredded mozzarella
- 1/2 cup (50 g) shredded cheddar
- 2 tbsp grated Parmesan
For Garnishing
- 2 tbsp fresh parsley, chopped
- Fresh basil, optional
Note: For strict keto plans, check the tomato sauce and canned tomato labels for added sugars.
Directions
- Preheat the oven:
Heat the oven to 400°F (200°C). If using a skillet that isn’t oven-safe, prepare a greased 9×13-inch baking dish instead. - Prepare the vegetables — 10 minutes:
Dice the onion and bell peppers into small, similar-sized pieces. Mince the garlic. - Brown the beef — 7–8 minutes:
Heat olive oil in a large oven-safe skillet over medium-high heat. Add ground beef and cook for 7–8 minutes, breaking it apart until browned and fully cooked. - Sauté onion and peppers — 5 minutes:
Add onion, red bell pepper, green bell pepper, and yellow bell pepper. Cook over medium heat for about 5 minutes, stirring occasionally, until the peppers begin to soften. - Add garlic — 30 seconds:
Stir in minced garlic and cook for approximately 30 seconds, until fragrant. - Season the mixture:
Add Italian seasoning, smoked paprika, oregano, garlic powder, salt, black pepper, and red pepper flakes. - Add cauliflower rice — 4–5 minutes:
Stir in cauliflower rice and cook for 4–5 minutes. If using frozen cauliflower rice, cook until most excess moisture has evaporated. - Add tomatoes and sauce:
Stir in drained diced tomatoes, tomato sauce, and tomato paste. Simmer over medium-low heat for 3–4 minutes. The mixture should be thick rather than watery. - Add the cheese:
Sprinkle mozzarella, cheddar, and Parmesan evenly over the top. - Bake — 15–18 minutes:
Transfer the skillet to the oven and bake at 400°F (200°C) for 15–18 minutes, until the cheese is fully melted and bubbling. - Broil — 1–2 minutes, optional:
For a golden-brown top, broil for 1–2 minutes. Watch closely because the cheese can burn quickly. - Rest — 5 minutes:
Remove from the oven and let the casserole rest for 5 minutes. This helps the filling set. - Garnish and serve:
Sprinkle with fresh parsley or basil and serve warm.
High-Protein Cooking Tips
- Choose 90% lean ground beef for a good balance of protein and flavor.
- Increase the beef to 1 3/4 lb (800 g) if you want an even more protein-forward casserole.
- Add shredded chicken or lean ground turkey for variety.
- Use Greek yogurt as a topping for an additional protein boost.
- Serve with a side of roasted broccoli or a fresh salad rather than a starchy side.
Nutrition Facts — Per Serving (Approximate)
Values are estimates and vary according to the beef, cheese, tomato products, and cauliflower rice used.
- Calories: 390 kcal
- Fat: 23 g
- Cholesterol: 90 mg
- Sodium: 680 mg
- Potassium: 760 mg
- Total Carbohydrates: 13 g
- Fiber: 4 g
- Net Carbs: 9 g
- Sugars: 6 g
- Protein: 34 g
- Calcium: 250 mg
Notes
- Storage: Refrigerate leftovers for up to 4 days.
- Freezing: Freeze portions for 2–3 months.
- Reheating: Reheat covered to prevent the cheese from becoming too dry.
- Allergy note: Contains dairy; use suitable dairy-free cheese if needed.
- Gluten-free: The basic recipe is naturally gluten-free, but check packaged tomato products and seasonings.
- Lower-carb tip: Use extra cauliflower and peppers while reducing tomato sauce.
- Flavor boost: Add Worcestershire sauce, fresh basil, chili flakes, or a splash of hot sauce.
- Cheese options: Monterey Jack, provolone, mozzarella, cheddar, or pepper Jack all work well.
Frequently Asked Questions
1. Can I use ground turkey instead of beef?
Yes, lean ground turkey works well and creates a lighter-tasting casserole.
2. Can I use frozen cauliflower rice?
Yes, but cook it long enough to evaporate excess moisture before baking.
3. Is Keto Stuffed Pepper Casserole actually low-carb?
Yes, this version contains approximately 9 g net carbs per serving, although the exact amount depends on the ingredients used.
4. Can I prepare this casserole ahead of time?
Yes, assemble it up to 24 hours ahead, refrigerate it covered, and bake when ready.
5. Can I freeze this casserole?
Yes, cool it completely, portion it into freezer-safe containers, and freeze for up to 2–3 months.
6. What can I serve with it?
Roasted broccoli, green salad, sautéed zucchini, asparagus, or cauliflower mash make excellent low-carb sides.
