Preheat your oven to 375°F (190°C).

In a large skillet, heat olive oil over medium heat, add ground turkey, salt, pepper, paprika, and thyme. Cook for 5-7 minutes.

Add diced onion and diced bell pepper to the skillet, cook for 5 minutes until softened.

Stir in spinach or kale and cook until wilted, about 2-3 minutes.

Combine the turkey mixture with cubed sweet potatoes in a large mixing bowl.

Pour the mixture into a greased baking dish and sprinkle cheeses on top.

Bake for 25-30 minutes until bubbly and golden brown.

Let the casserole sit for 5-10 minutes before serving.