You can store the short ribs in the fridge for up to 4 days or in the freezer for up to 4 months. The easiest way to reheat any stew is in an Instant Pot. After I remove the hardened fat cap, I plop everything into the Instant Pot and cook it for 3 minutes under high pressure. You can even reheat the stew from frozen using the same instructions—it’ll just take longer to reach high pressure before the 3 minute countdown starts.