If you have a gas grill with a thermometer you want to heat it until it reaches 400 degrees F. Using charcoal, light and then leave until they become white coals, then it is the right time to start grilling.
Lay desired number of frozen patties on to your grate. Grill until juices begin to come thru on the heated side (about 5 minutes), and then flip over to the other side until the same thing happens.
Test internal temperature, it should reach 165 f. Season both sides with salt and pepper and dress with a bun and fixings.