Preheat the oven: Preheat your oven to 350°F (175°C).
Cook the turkey: In a large skillet over medium heat, add the ground turkey and cook until browned, breaking it apart with a wooden spoon. About 5-7 minutes. Drain any excess fat.
Sauté vegetables: Add the chopped onion and minced garlic to the skillet. Sauté for about 3-4 minutes until the onion is translucent.
Mix in the liquids: In a large mixing bowl, combine the cream of chicken soup, milk, dried thyme, dried rosemary, paprika, salt, and pepper. Whisk until smooth.
Combine ingredients: To the bowl, add the cooked ground turkey mixture, cooked rice, and half of each cheese (cheddar and mozzarella). Stir until well combined.
Prepare the herb butter: In a small bowl, mix the softened butter with a pinch of salt, pepper, and any remaining fresh herbs you desire. This will add flavor to your casserole.
Build the casserole: Grease a 9x13-inch baking dish. Pour the turkey mixture into the dish. Drizzle the herb butter over the top of the casserole. Sprinkle the remaining cheese on top, and if desired, add breadcrumbs for a crunchy topping.
Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until bubbly and golden brown on top.
Garnish and serve: Once out of the oven, let it rest for 5 minutes. Garnish with chopped fresh parsley before serving.
Notes
Optional breadcrumbs can be added for a crunchy topping.