If don't have time to wait for your frozen burgers to thaw, you can cook them directly from frozen. Here's how to do it.

Add an additional sprinkle of salt and pepper to the outside of the burgers, if desired. Seasoning the inside and outside of ground beef patties makes sure they’re packed with flavor throughout.

Lay the four slices of onion in the tray and season lightly ... To assemble, lay out the burger buns, smother the bases with mayonnaise, then pop the patties with the onion and cheese on each ...