Thread pork, red onion pieces and pineapple cubes on skewers. Brush kebabs with 1/2 cup teriyaki sauce. Cook on grill or grill pan over medium-high, turning, until pork is cooked through, 12 to 15 minutes. Using clean brush, glaze with 1/4 cup teriyaki sauce. In bowl, toss snap peas, red onion slices and 1 tbsp. teriyaki sauce. Serve with skewers.