This is an awesome recipe! I'm one of those cooks who just can't leave a recipe alone, so I changed it up a bit. I saute`ed the chicken in olive oil, and added 2 minced fresh garlic cloves, 1 tablespoon dried sweet basil, and 1 teaspoon sea salt.
For the sauce, I used 3 1/2 cups heavy cream, and added dried sweet basil, 1/2 chicken bouillon cube, 1/2 teaspoon garlic powder, 1 tablespoon real butter, and 1/2 cup chicken broth. I used a full cup Asiago cheese, and substitued bacon for the proscuitto. I also cooked the bacon, mushrooms, and fresh garlic in olive oil, rather than butter.
My whole family loved this recipe! If you were to add capers and a sqeeze of fresh lemon juice, it would taste just like a favorite dish at a well known Italian Restaurant....which is what I plan to do next time!