can cooking spray be used with the george foreman grill
1 Heat grill. 2  Spray grill (or onions!) with non-stick cooking spray, or brush with olive oil. 3  Lay onion rounds on the grill, close it, and grill for 10-15 minutes. 4  Check at the halfway point, and turn rings over with a spatula if you want to fiddle with them.5  Or donât, if you donât.6  It wonât matter.nstructions. 1  Heat grill. 2  Spray grill (or onions!) with non-stick cooking spray, or brush with olive oil. 3  Lay onion rounds on the grill, close it, and grill for 10-15 minutes. 4  Check at the halfway point, and turn rings over with a spatula if you want to fiddle with them. 5  Or donât, if you donât. 6  It wonât matter.