If you're looking to cook up some burgers on your Traeger grill, there is a little bit of a tricksy (but delicious) process you need to follow. First, make sure the grill is preheated to the desired temperature. Then, add the burgers to the grates. Make sure they are evenly spaced out so that they cook evenly. Finally, place the frozen burgers on the grill and wait for them to cook until they reach your desired doneness.