Directions
1. Soak the skewers in water for 30 minutes. Preheat a charcoal or gas grill for direct cooking over medium-high heat. (Indoors, use a grill plate over a burner set to medium-high.)
2. Combine the syrup, brown sugar, oil, chili garlic sauce, cinnamon and salt in a medium bowl. Add the pineapple, toss to coat and marinate for 5 to 10 minutes. Thread pineapple onto skewers; reserve sauce. Grill 6 minutes, turning occasionally and brushing with reserve sauce. Garnish with red pepper flakes. Serve warm.