Made this the other day for lunch and forgot to review...I cut the recipe in half for DH, DH's dad and myself and added leftover frozen corn, diced celery and diced carrots (sauteed with the onion and garlic). WONDERFUL!!! I didn't need to add the full amount of instant potatoes because my soup thickened very nicely. I did add some Velveeta. This is a favorite for us and going in my "Best of 2010 Favorites". Thank you again for a wonderful dish.
The only change I made in preparing this recipe was to use cheddar instead of parmesan. The chowder thickened up nicely and I did add in the optional garlic which resulted in a flavorful dish. The only complaint I had was that the texture of the soup was sort of grainy from the potato flakes. Thanks for sharing the recipe!