Cook pasta according to directions, drain and put pack into the warm pot.
Meanwhile, heat oil in a large frying pan over medium high heat. Cook onion, garlic and mushrooms until fragrant and semi done. Add Prosciutto and asparagus and cook until asparagus is bright green, about 3 minute
Add cream, 1/3 cup cheese, salt and pepper and red pepper flakes. Reduce heat to simmer and cook until sauce has thickened, about 4 minutes.
Pour sauce with vegetables over pasta and toss to coat.
Top with additional parmesan cheese and, if desired, prosciutto chips (see recipe description).