Creating a Keto Breakfast Casserole is straightforward. Follow these simple steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Brown the Sausage: In a skillet, cook the breakfast sausage over medium heat until browned. Drain excess fat if necessary.
3. Sauté Vegetables: Add the diced onion and bell pepper to the skillet. Sauté until soft, about 5 minutes. Stir in the chopped spinach and cook until wilted.
4. Combine Eggs and Cream: In a large bowl, whisk together the eggs and heavy cream until well blended. Add garlic powder, onion powder, salt, and pepper.
5. Mix Ingredients: In a greased 9×13-inch baking dish, layer the sausage mixture and sprinkle half of the cheese on top. Pour the egg mixture over the sausage and vegetables.
6. Add Cheese: Top with the remaining cheese evenly across the casserole.
7. Bake: Place in the preheated oven and bake for 30 minutes or until the casserole is set and golden on top.
8. Cool Slightly: Remove from the oven and let it cool for about 5 minutes.
9. Slice and Serve: Cut into squares and garnish with fresh herbs if desired.

These clear instructions will guide you through the process of creating this fantastic dish effortlessly.