bring 8 cups of water to a boil seasoned with 2t salt cook pasta for 11-12 minutes until al dente strain and reserve ½ cup of the pasta cooking water

halve and slice onion into ¼ inch slices lengthwise slice mushrooms into ¼ inch rough chop croutons rough chop parsley

while the water is coming to a boil, heat a large non stick over medium high heat add 2 t olive oil and onions to hot pan with a pinch of salt cook for 10-13 minutes stirring occasionally until caramelized once caramelized remove from pan and return pan to medium high heat

in same pan heat 1 T olive oil add mushrooms and sear 2 minutes, stir sear another 2 minutes season with pinch of salt and pepper add shrimp and cook for 3-4 minutes add onions, butter and wine and reduce until dry add pasta, reserved pasta water, ½ of the cheese, parsley, stir in and remove from the heat off the heat stir in the sour cream until mixed in

plate top with other ½ of cheese and croutons