Cheeseburger-Stuffed Bell Peppers with Mustard Mayo

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Bell peppers filled with a savory ground beef and cheese mixture, topped with a tangy mustard mayo for a satisfying keto meal. This american-inspired keto (keto, low carb) ready in about 40 minutes pairs halved and seeded large bell peppers, 85% lean ground beef, shredded cheddar cheese for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 25 min Serves 4 American cuisine 450 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F. Drizzle 2 tbsp olive oil over 4 halved and seeded large bell peppers and place them cut side up on a baking sheet.
  2. Step 2: In a skillet over medium heat, sauté 1/2 medium finely diced onion and 2 minced garlic cloves for 3 minutes until translucent and fragrant.
  3. Step 3: Add 1 lb ground beef, 1 tsp salt, and 1/2 tsp black pepper to the skillet. Cook, breaking up meat, for 7-8 minutes until browned and cooked through. Remove from heat.
  4. Step 4: Stir 1 cup shredded cheddar cheese and optional 4 chopped pickle slices into the beef mixture.
  5. Step 5: Spoon the beef and cheese filling evenly into the bell pepper halves. Bake in the preheated oven for 15 minutes until peppers are tender and cheese is melted.
  6. Step 6: Meanwhile, mix 3 tbsp mayonnaise with 2 tbsp yellow mustard in a small bowl to make mustard mayo.
  7. Step 7: Remove stuffed peppers from oven and drizzle each with mustard mayo before serving.

Equipment for this recipe

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Frequently asked questions

How long does Cheeseburger-Stuffed Bell Peppers with Mustard Mayo take to make?

Total time is about 40 minutes (15 min prep + 25 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Cheeseburger-Stuffed Bell Peppers with Mustard Mayo?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep 85% lean ground beef from drying out.

Can I substitute ingredients in Cheeseburger-Stuffed Bell Peppers with Mustard Mayo?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Cheeseburger-Stuffed Bell Peppers with Mustard Mayo for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Cheeseburger-Stuffed Bell Peppers with Mustard Mayo keto?

Yes — this recipe is tagged keto, low carb, gluten free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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