This Easy Turkey Tetrazzini is so creamy and delicious filled with pasta, tender turkey, and green beans all in an easy homemade sauce then topped with Parmesan and baked until golden and perfect. A family meal that is a winner with everyone!
Cook spaghetti to al dente per package directions.
Preheat oven to 375°F.
In a large skillet, melt butter over medium heat.
Add the onions and mushrooms and cook until onions are soft and translucent.
Add the minced garlic and cook another minute until garlic is fragrant.
Sprinkle the flour, salt, black pepper and parsley over the onions and mushrooms and stir to combine everything. Cook and stir 1-2 minutes.
Slowly add the chicken broth while stirring. Then stir in the heavy cream. Bring to a low boil and boil until thickened enough to coat the back of a spoon. Then remove from heat.
Stir in sour cream.
Pour the sauce over the cooked and drained spaghetti and toss it together.
Add the turkey and green beans and stir to combine it all.
Add it all to a deep 3 quart casserole dish.
Evenly sprinkle the top with grated parmesan cheese.
Bake for 25-30 minutes until golden brown and bubbling.