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Ground Beef Casserole

A low-carb, Keto-friendly casserole combining seasoned ground beef, fresh spinach, and cauliflower rice, topped with melted Italian cheese. Ready in just 25 minutes.
Prep Time 10 minutes
Cook Time 15 minutes
Total Time 25 minutes
Course Dinner, Main Course
Cuisine American
Servings 4
Calories 385 kcal

Ingredients
  

  • 1 tablespoon olive oil
  • 1 small yellow onion diced
  • 3 cloves garlic minced
  • 1 pound lean ground beef
  • 1 teaspoon Italian Seasoning
  • ½ teaspoon sweet paprika
  • salt and freshly ground black pepper to taste
  • 6 ounces fresh baby spinach
  • 10 ounces frozen cauliflower rice cooked according to the directions on the bag
  • 1 cup sour cream or plain yogurt
  • 1 tablespoon butter room temperature
  • ½ teaspoon dried basil
  • 2 to 3 tablespoons milk if needed
  • 8 ounces shredded Italian blend cheese or any other shredded cheese that you have/prefer

Instructions
 

  • Preheat your oven to 375°F.
  • Heat olive oil in a large skillet over medium-high heat. Add the diced onion and cook for 2 minutes until softened. Stir in the minced garlic and cook for another 30 seconds.
  • Add the ground beef to the skillet. Season immediately with Italian Seasoning, sweet paprika, salt, and black pepper. Break up the meat with a wooden spoon and cook until completely browned, about 6-8 minutes.
  • Add the baby spinach to the skillet (in batches if needed). Stir frequently for about 1 minute until the spinach is completely wilted. Remove from heat, drain any excess liquid, and set aside.
  • In a baking dish, combine the cooked cauliflower rice, sour cream, butter, and dried basil. Stir until completely combined and creamy. Add milk 1 tablespoon at a time if the mixture seems too thick.
  • Add the prepared beef and spinach mixture to the baking dish with the cauliflower. Stir until everything is evenly distributed and well incorporated.
  • Sprinkle the shredded Italian blend cheese evenly over the top, covering the entire surface.
  • Bake for 22-25 minutes until the cheese is melted and bubbly with lightly golden edges.
  • Remove from the oven and let stand for 5 minutes before serving. This allows the casserole to firm up for easier cutting.

Notes

Make Ahead: Assemble the casserole in advance, cover tightly, and refrigerate. Remove from fridge 15-20 minutes before baking for even cooking.
Storage: Refrigerate leftovers in an airtight container for up to 3 days. Freeze for up to 3 months.
Reheating: Heat in oven at 375°F until warmed through, or microwave individual portions, stirring halfway.
Protein Substitutions: Ground turkey, ground pork, or Italian sausage work well in place of ground beef.
Vegetable Additions: Add diced carrots, frozen peas, corn, mushrooms, or bell peppers for extra nutrition.
Non-Keto Option: Replace cauliflower rice with 2 cups cooked white rice, brown rice, or quinoa.
Cauliflower Rice: Precooking the cauliflower rice is recommended for best texture and creaminess, but raw will work with 10 extra minutes baking time.
Keyword ground beef casserole, keto casserole