For the smoothest queso sauce, keep the heat on low and avoid letting the dairy come to a full boil, which can cause separation. You can substitute chicken thighs for a richer, juicier result, or swap in Monterey Jack cheese for a milder, creamier flavor. Leftovers keep well in the refrigerator in an airtight container for up to 4 days and reheat best gently over low heat with a splash of cream to loosen the sauce. To keep carbs low, pair this dish with non starchy vegetables such as cauliflower rice, broccoli, or sautéed zucchini instead of rice, beans, or tortillas.