You can freeze this stir fry after cooking it in an airtight container for up to 4 months. To reheat, thaw it in the fridge for 24 hours before reheating it. Then to reheat it, the best way is in a skillet on the oven. This will help to give some texture and crunch back to the veggies that may have softened quite a bit in the freezing process. You can add a tablespoon of soy sauce, tablespoon of water, and teaspoon of sesame oil to help bring back some sauce at the end of the reheating.