This brilliant pasta dish cuts down on calories and clean up time in the kitchen. By cooking the entire recipe in one pan—including the noodles—the pasta starch thickens the cooking liquid, making a thick, rich sauce without butter or cream. Be sure to use a large, high-sided skillet so you can easily simmer and stir the pasta.
Heat oil in a large, high-sided skillet over medium-high. Add sausage and mushrooms; cook, stirring often, until browned, about 8 minutes. Add stock and next 5 ingredients; bring to a boil. Cook, stirring constantly, until pasta is al dente and liquid is mostly absorbed, about 15 minutes. Stir in vinegar, and sprinkle with crushed red pepper.