Noodles: I recommend egg noodles for this recipe, but you can also experiment with other types of noodles or pasta.
Milk or Cream: I use skim milk here - just a way to cut down on those calories - but you can use half & half or even heavy cream for a creamier, thicker sauce.
Cheese Alternatives: If you're not a Parmesan fan, try shredded mozzarella or crumbled feta.
Vegetables: You can toss in other vegetables that you have on hand, like bell peppers, corn, zucchini, or spinach.