You sure can! You can freeze the assembled hotdish before you bake it — right in the cast iron skillet, if you want — or freeze your leftovers. Here’s how.  To freeze before baking, prepare this hotdish recipe through simmering the hamburger mixture. If you are freezing it in the cast iron skillet, let it cool completely in the skillet. Otherwise, place the hamburger mixture in a 9x9 baking dish sprayed with cooking spray. Once the ground beef mixture has cooled, add the bacon, cheese, and sweet potato tater tots. Tightly wrap it in plastic wrap, then aluminum foil, and freeze it for up to three months. When it’s time to bake, remove the foil and plastic wrap and bake it from frozen (you don’t want the tots to thaw), so allow extra time to bake. Check that the internal temperature reaches 165.  To freeze after baking, tightly wrap your cooled leftovers in plastic wrap, then aluminum foil, and freeze for 2-3 months.