Preheat oven to 350 degrees. Spray an 8x11 baking dish with non stick spray and set aside.
Cook penne pasta according to package directions for al dente. Drain and pour into the baking dish.
While the pasta is cooking, wash the asparagus and break off the tough woody ends. (You can gently bend them and they will break at the right spot.) Then chop the asparagus into bite sized pieces, about 1 inch. Place into a shallow dish with a little water. Microwave on high for 3 minutes. Drain and add to the baking dish.
Cook sausage links until no longer pink in the center. Slice into bite sized pieces. Add to the baking dish.
Pour the sauce on top of all ingredients and stir to combine well. Tear the mozzarella into chunks and place on top.
Bake uncovered for 30 minutes, until heated through and the cheese is melted and bubbly.