To freeze beef stew, ladle it into quart-sized freezer bags, press out the air, and seal. Or store your hearty beef stew in an airtight container. Write the date on the bag and freeze for up to 3 months. To thaw beef stew, place it in the refrigerator overnight. Reheat beef stew on the stove over medium heat until warmed through. Or, transfer it to a microwavable container and microwave on high for 2-3 minutes.