Two Healthy Kitchens
Cook pasta according to package directions. Drain. Meanwhile, preheat a nonstick skillet over medium to medium-high heat. Add olive oil and then onions. Continue cooking until sausage is cooked.
Serve sauce over warm penne. Alternately, you can toss the pasta right into the skillet with your tomato sauce, stir it together, and serve it homestyle, directly from the skillet.