# What You'll Need:
→ Poultry & Dairy
01 - 2 cups cooked shredded turkey or chicken
02 - 1 cup whole milk
03 - 1/2 cup sour cream
04 - 1/2 cup grated Parmesan cheese, divided
05 - 1 cup shredded mozzarella cheese
→ Pasta
06 - 8 ounces cooked spaghetti or linguine, drained
→ Vegetables
07 - 1 cup thawed frozen peas
08 - 1/2 small yellow onion, finely chopped
09 - 2 cloves garlic, minced
→ Sauce & Seasonings
10 - 2 tablespoons unsalted butter
11 - 2 tablespoons all-purpose flour
12 - 1/2 teaspoon salt
13 - 1/4 teaspoon black pepper
14 - 1/4 teaspoon dried thyme
15 - 1/4 teaspoon ground nutmeg, optional
→ Topping
16 - 1/2 cup panko breadcrumbs
17 - 2 tablespoons melted butter
18 - 1/4 cup grated Parmesan cheese
# How to Make It:
01 - Preheat the oven to 400°F. Lightly grease a 9x13-inch baking dish.
02 - In a large skillet over medium heat, melt unsalted butter. Add chopped onion and minced garlic; sauté for 2 to 3 minutes until softened.
03 - Stir in flour and cook for 1 minute. Gradually whisk in whole milk, stirring constantly until sauce is smooth and thickened, approximately 2 to 3 minutes.
04 - Remove from heat. Stir in sour cream, 1/4 cup grated Parmesan, shredded mozzarella, salt, pepper, dried thyme, and optional nutmeg until fully incorporated.
05 - Fold in cooked spaghetti, shredded turkey or chicken, and thawed peas until mixture is evenly coated. Transfer the mixture into the prepared baking dish.
06 - Combine panko breadcrumbs, melted butter, and remaining 1/4 cup grated Parmesan cheese in a small bowl. Sprinkle the mixture evenly over the casserole.
07 - Bake in preheated oven for 15 to 20 minutes until the topping is golden brown and bubbling. Allow to rest for 5 minutes before serving.