First put your pot of water to boil while you make your sauce so your noodles and sauce will be done about the same time.
In a large saute pan, add the sausage and break it up using a wooden spoon spatula, and cook for 2 to 3 minutes or until the sausage is browned do not drain add the garlic and onions cook it, stirring, for about 1 minute or until it is golden brown. Take care not to let the garlic burn. Add your seasonings.
Add the tomatoes, raise the heat to high, and bring the sauce to a boil. Reduce the heat slightly and simmer it briskly for 5 to 8 minutes or until it starts to thicken. Stir in 1/4 cup of the grated cheese and cook the sauce for about 3 minutes or until it thickens. Season it to taste with salt and pepper.
Drain the pasta well. Bring the sauce to a boil. Add the pasta and mix well. Stir in 1/4 cup of grated cheese, if desired. Serve the pasta with the remaining 1/4 cup of grated cheese passed on the side.