Cook Reames Home Style Egg Noodles according to package directions; set aside. In a large pot, melt butter; saute onions, garlic and mushrooms until tender. Add chicken stock, sour cream, and 1/2 cup of half-and- half. Mix remaining 1/2 cup of half-and-half with cornstarch, add to the pot and cook until thickened. Add leftover turkey, salt and pepper and cooked noodles. Bring mixture to a boil. Boil for two minutes. Toast peasant bread. To serve, place a slice of toasted bread on plate and top with noodle mixture.