I LOVE this pita bread instead of a bun, it always you to enjoy your burger without filling up on bread, and who doesn't love grilled mushrooms and onions on their burger, hope you try this sometime eatingoodinthetrailerhood.blogspot.c...
Form patties as you normally would, cut off 1/3 of the top part of patty.
Slice onions and mushrooms. Grill in a grilling basket or on a flat slotted grilling pan. Toast pita pockets on grill.
Grill burgers as you normally would to your preference of doneness. Just as they are done, place grated cheese on top and close grill. Allow about two minutes for cheese to melt. We grill these over hickory wood, soooo good.
Add mushrooms and onions on top and place patties with cheese in your pita pocket.