In a large pan (stock pot, dutch oven, or similar), bring 6 cups of water to a boil.
Add noodles and continue to boil for 10 minutes or until tender.
Drain noodles and leave in colander.
Add pound of pork sausage to pan, and brown over low to medium heat.
Drain grease from pork sausage and return to pain.
Add the jar of spaghetti sauce to the pork sausage in the pan. Stir.
Add mushrooms and cheeses.
Bring sauce, meat, and cheese mixture to a bubble.
Add noodles, stirring.
Heat on medium for five minutes.