1Rinse porcini mushrooms to remove sediment; then put into small bowl with 3/4 C hot water to soak 20 minuts. Drain & reserve liquid. Chop porcini mushrooms discarding any dry hard stems.
2Fry sausage in olive oil and add onion, garlic, wine, bay leaf and boil until liquid evaporates, about 4 minutes. Add broth and porcini liquid and simmer stirring occasionally until mixture becomes syrupy,about 10 minutes.
3Cook pasta, drain and add to pan sauce. Stir well, remove from heat and add parmesan cheese. Remove bay leaf before serving. Add salt to taste.