This substance is the same thing which leaves brown marks on concrete or other floor surfaces if it sits in one place for a long period of time. (mechanics.stackexchange.com)
Brush both sides of each pita round very lightly with oil and grill over moderate heat, turning once, until brown marks appear on the bread's surface, 3 to 4 minutes. (jovinacooksitalian.com)
Brush both sides of each pita round very lightly with oil and grill over moderate heat, turning once, until brown marks appear on the bread's surface, 3 to 4 minutes. (jovinacooksitalian.com)