Serve immediately. Garnish with fresh parsley, if desired.
Leftovers stay fresh in the refrigerator for up to 5 days. It can get thick in the refrigerator as the pasta soaks up the sauce, but warming them up in the microwave thins out the sauce.
Notes
Make Ahead Instructions: This can be made in advance up to 1 day. Store in the refrigerator, covered with foil, bake for 30 minutes until heated through.
Pasta: Any small-type pasta such as rotini, elbows, or shells works best for this recipe.
Milk: For best results, use whole milk.
Cheese: Any type of cheese works for this recipe, though we love to use sharp cheddar.