Place the pineapple, 2 tablespoons oil, garlic, cumin, oregano, 1/2 teaspoon pepper and 1/4 teaspoon salt in a blender; cover and process until blended. Place in a large resealable plastic bag; add pork. Seal bag and turn to coat; refrigerate 1 hour. , Drain and discard marinade. Place pork on greased grill rack. Grill, uncovered, over medium heat for 3-4 minutes on each side or until a thermometer reads 145°. Let stand for 5 minutes before serving., Place vegetables in a grill wok or basket. Brush with remaining oil; sprinkle with remaining salt and pepper., Grill, uncovered, over medium heat for 6-8 minutes or until tender, stirring frequently. Cut vegetables into 2-in. pieces. Serve with pork.