Cool leftovers quickly and refrigerate in an airtight container within two hours. Store in the fridge for 3–4 days. To reheat, warm gently on the stove over low heat with a splash of milk or water to loosen the sauce, stirring often to keep it smooth. Freezing is possible (up to 2 months), but note the yogurt-based sauce may separate slightly when thawed; reheat slowly and whisk in a little fresh yogurt or milk to re-emulsify.