To store leftovers, transfer them to an airtight container and refrigerate for up to 3 days. For reheating, use the stovetop or microwave. On the stovetop, occasionally stirs leftovers in a saucepan over low to medium heat with a splash of water or broth. In the microwave, place a portion in a microwave-safe dish, cover, and heat on medium power in short intervals, stirring occasionally. Avoid reheating in the oven to prevent overcooking. Enjoy your reheated ravioli in creamy tomato sauce!