While Pesto Smashed Potatoes are best served fresh, you can store the potatoes and pesto separately in the refrigerator. After you air fry the potatoes, you can store them in a sealed container and place them in the refrigerator once at room temperature. Keep the pesto in a separate container until you are ready to serve the smashed potatoes. You can store the potatoes for 3-4 days. Once ready to serve, you can reheat the Smashed Potatoes using the Instant Pot Duo Crisp’s air fry function or use a conventional oven to heat until warm throughout. Then you can continue to top with pesto and parmesan, and continue to follow the next steps in the recipe’s instructions.