Creating your Sweet Potato Breakfast Casserole is straightforward. Follow these simple steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).

2. Prepare Sweet Potatoes: In a large pot, boil the cubed sweet potatoes until tender, about 10-15 minutes. Drain and set aside.

3. Mix Eggs and Milk: In a large mixing bowl, whisk together the eggs and milk until well combined.

4. Add Spices: Stir in the salt, black pepper, garlic powder, onion powder, smoked paprika, and cayenne pepper (if using) into the egg mixture.

5. Combine Ingredients: In a baking dish, layer the cooked sweet potatoes at the bottom. Pour the egg mixture over the sweet potatoes, ensuring even coverage.

6. Add Cheese: If using cheese, sprinkle it over the top for a deliciously cheesy finish.

7. Bake: Place in the preheated oven and bake for 40-45 minutes, or until the eggs are set and the top is golden brown.

8. Cool: Once baked, remove from oven and allow to cool for about 5 minutes before slicing.

9. Garnish: Top with freshly chopped green onions before serving for an extra pop of flavor.

10. Serve: Slice into squares and serve warm.

Following these steps will lead you to an incredible Sweet Potato Breakfast Casserole that is sure to impress everyone at the table!