Set your oven to 350°F (180°C). Lightly grease a baking dish and set aside.
Boil the pasta according to package directions, but remove it from the water 2–3 minutes before it reaches al dente. Drain and set aside.
3 cups elbow or bowtie pasta
In a large skillet over medium heat, melt the butter. Add the onion, mushrooms, and garlic. Cook for about 7 minutes, stirring occasionally, until the vegetables are tender.
2 tablespoons butter, 1 onion, 2 cups mushrooms, 2 garlic cloves
In a large mixing bowl, combine the sautéed vegetables, condensed cream of chicken soup, milk, oregano, Swiss cheese, and cooked turkey. Season with salt and pepper to taste. Add the pasta and stir until everything is evenly coated.
2 cups condensed cream of chicken soup, 1 ⅓ cups milk, ½ teaspoon dried oregano, 1 ½ cups Swiss cheese, 3 cups cooked turkey, Salt and pepper
In a small bowl, mix the melted butter and seasoned bread crumbs.
¼ cup seasoned bread crumbs, ¼ cup butter
Transfer the pasta mixture into the prepared baking dish. Spread the breadcrumb mixture evenly over the top. Bake for 15–20 minutes, or until the topping is golden brown and crisp.
Garnish with fresh basil and serve warm.
Fresh basil leaves