1 1/2cupsshredded cheddar cheeseor mozzarella/Monterey Jack
1/2cupgrated Parmesan cheese
1/2tspsalt
1/4tspblack pepper
1/4tspdried thymeoptional
1/2cupbreadcrumbsfor topping
Instructions
Bring a large pot of salted water to a boil. Cook spaghetti until just al dente (1–2 minutes less than package). Drain and set aside.
In a large skillet, melt butter over medium heat. Add onion, garlic, and mushrooms. Cook until softened, about 5–6 minutes.
Sprinkle flour over vegetables. Stir and cook for 1 minute. Slowly whisk in broth, then milk and cream, until smooth. Simmer 3–4 minutes until slightly thickened.
Stir in turkey, peas, 1 cup cheddar, and half the Parmesan. Season with salt, pepper, and thyme.
Toss cooked spaghetti with sauce. Transfer to a greased 9x13-inch baking dish. Sprinkle the remaining cheese and breadcrumbs on top.
Bake at 375°F (190°C) for 20–25 minutes until bubbly and golden brown on top.
Rest 5 minutes before serving.
Notes
Use leftover turkey or chicken; substitute cream with extra milk to cut cost and calories.
Assemble the casserole up to 1 day ahead, cover, and refrigerate. Bake just before serving.
Add bell peppers or carrots for more veggies; use different cheeses for new flavors.