This easy 30-minute keto cheeseburger casserole is hearty, filling, and an excellent alternative to a classic cheeseburger.

PREPRATION TIME:

Prep Time15minutes mins

Cook Time15minutes mins

Total Time30minutes mins

Ingredients:

• Olive oil spray for the baking dish
• 2 tablespoons olive oil
• 2 pounds extra-lean ground beef
• 1 medium onion finely chopped (6 ounces)
• 2 teaspoons Diamond Crystal kosher salt or 1 teaspoon of any other salt
• ¼ teaspoon black pepper
• 1 tablespoon fresh garlic minced
• ¼ cup mayonnaise
• ¼ cup unsweetened ketchup
• 1 tablespoon mustard
• 1 ½ cup cheddar sharp, shredded, divided (6 ounces)

Instructions:

• Preheat your oven to 400°F. Spray a 2-quart baking dish with olive oil. 
• Heat the olive oil in a large skillet over medium-high heat for about 2 minutes. Add the beef and the onions. Cook, stirring to break up the beef until the meat is browned and the onion is soft, for about 5 minutes. 
• If there are liquids at the bottom of the skillet, carefully drain the mixture and return it to the skillet. Stir in the kosher salt, black pepper, and garlic. Cook, stirring, for 1 more minute.
• Turn the heat off. Stir in the mayonnaise, unsweetened ketchup, mustard, and 1 cup of shredded cheddar. 
• Transfer the mixture to the prepared baking dish. Sprinkle with the remaining cheese. 
• Bake until the cheese is melted and the casserole is heated through, for about 15 minutes. Alternatively, if your baking dish is broiler-safe, broil the casserole 6 inches below the heating element (not directly below) until the cheese is melted, 1-2 minutes. Serve immediately.

Notes

• If you’d like to turn this casserole into a complete meal, add 1-2 cups of uncooked riced cauliflower to the ground beef/onion and cook everything together. You’ll need to increase the olive oil by 1-2 tablespoons.
• You can make this recipe with ground chicken or turkey thighs. It won’t be the same, but it’s still good. I recommend using ground chicken thighs, not chicken breast, which is too lean.
• You can keep the leftovers in the fridge, in an airtight container, for 3-4 days. Reheat them gently in the microwave at 50% power. You can also freeze individual servings for up to three months.

Nutrition per Serving

Calories: 458 kcal | Carbohydrates: 4 g | Protein: 38 g | Fat: 31 g | Saturated Fat: 7 g | Sodium: 771 mg | Sugar: 2 g