Start by putting the ziti noodles to boil and drain.
Slice smoked sausage into desired size pieces, the flatter and thinner the better and brown them in a skillet.
Combine spaghetti sauce, mushrooms, garlic powder, onion powder, parsley flakes,and salt in a sauce pan and simmer for 5 minutes. (also add any other ingredients you like in your sauce, like peppers, at this time)
Add browned smoked sausage to sauce and simmer an additional 5 minutes so that all ingredients flavors have time to combine.
In a 9x9x2 glass baking dish start layering ingredients. First a small amount of spaghetti sauce on bottom of dish to keep noodles from sticking, then ziti noodles, then the rest of the spaghetti sauce, smother in the shredded cheddar cheese.
Bake (uncovered) at 350 for 30 minutes or until cheese has began to bubble and turn golden brown.