For a healthier option, substitute Greek yogurt for sour cream and reduced-fat Velveeta cheese., Add fresh cilantro or avocado slices before serving for added flavor and color., Vegetarian alternatives include replacing chicken with black beans or lentils., Enhance spice by adding diced jalapeños or hot sauce to filling., Experiment with seasonal vegetables such as zucchini, spinach, or corn as additional filling., Use ground beef, turkey, or pulled pork instead of chicken for protein variation., You can assemble enchiladas ahead of time and refrigerate; add queso sauce before baking., Leftovers can be stored in an airtight container in the refrigerator for up to 3 days or frozen for up to 2 months., To reheat, bake at 350°F (175°C) for 15-20 minutes for best texture., Cheese sauce should be melted slowly and stirred constantly to avoid lumps; adding a little milk can smooth the sauce if needed.