This recipe is as customizable as you want: swap ground beef for turkey or chicken, add extra veggies (zucchini, bell peppers, mushrooms, or spinach), or to make it gluten-free use your favorite GF elbows. Try pepper jack, Monterey Jack, gouda, or even Velveeta for the cheese! To store, refrigerate in airtight containers for up to 4 days; reheat with a splash of water or broth. Freezes well for up to 2 months. Baked or unbaked—the choice is yours!