You can use light mayo to reduce the calories a little bit. You can also use whole wheat pasta. If you are short on time you can use canned chicken breast that is drained and chopped up. If you prefer to cook and crumble your own bacon instead of using real bacon pieces that is also an option.
Depending on how many ounces of pasta you use...you may want to use the larger quantities of mayo and garlic salt. Some people like more "sauce" on their pasta salad than others.
Adapted from Ready, Set, Eat