Set grill or grill pan to medium-high. Divide beef into 8 equal balls. Set a 12" cast-iron skillet on grill or stovetop and coat with grilling spray. Add 4 balls of meat and, using a metal spatula (or the bottom of a skillet), press down on each ball for at least 10 seconds to form a patty.
Season burgers with salt and pepper. Continue to cook until the juices start to bubble, 1 to 2 minutes more. Using a metal spatula, flip burgers, scraping up any caramelization on bottom of pan. Divide 1 slice of cheese between 2 burgers in pan. Cover pan with a baking sheet and continue to cook until cheese melts, 1 to 2 minutes more. Place the other 2 burgers in pan on top of cheeseburgers. Repeat with remaining beef and cheese.
To assemble, spread 1 tablespoon barbecue sauce onto each bun. Add smash burgers and top with crispy fried onions. Serve with lettuce, onion and tomato slices, if using.
Source: Hannaford fresh Magazine, May June 2025