Take the beef mince and roll it into a ball , like a very large meat ball . Now you can either do this one of two ways , 1 take the meat ball and flatten it to a thin large round patty using your palms to about 2cm thick . Or 2 place the meat ball into the heated bbq or grill plate , and flatten using your bbq flip (egg flip) and tongs to push down with , to flatten the patty to about 2cm thick