What temperature should you cook hamburgers on a George Foreman Grill?

Start out at 425F. Cook the burgers for 3 minutes, then turn them over for another 3 minutes. After the last 3 minutes, take a knife and cut it open to make sure that they are brown in the middle. If there is alittle red, put the lid back down for a minute or two. Otherwise, enjoy your burgers! >:D