Cut each pita in half; open each to form a pocket. Combine mushrooms, zucchini, onions and red pepper. Microwave on high, uncovered, 3 minutes or until just tender, stirring once; drain. Stir in cheese. Divide filling among breads. Place on paper towel-lined platter; cover with paper toweling. Microwave on high 2 to 3 minutes or until filling is heated and cheese starts to melt, rotating dish once.
Recipe from the North Dakota Wheat Commission.