Marinate the shrimp. Whisk together mango chutney with ketchup, apple cider vinegar, honey, soy sauce, garlic, ginger, turmeric, black pepper, and a pinch of red pepper flakes. Reserve ½ of the sauce and set it aside. Pour the remaining sauce over the shrimp and let sit for 30 minutes.
Add reserved sauce and 2 tablespoons of brown sugar to a medium saucepot. Bring to a simmer over medium heat and cook for 3-4 minutes or until slightly thickened. Let cool slightly.
Thread shrimp, mango, and red onion onto skewers, alternating shrimp with fruit and vegetables. Lay skewers on the grill and baste with reduced sauce. Flip the skewer over and continue to baste with the sauce until the shrimp is cooked. Remove from heat. Garnish the skewers with chopped cilantro and serve with lime wedges, if desired.
Notes
Buy extra-large shrimp or jumbo shrimp (16-20 count per pound) to avoid overcooking the shrimp.You can cook the skewers in the oven at 425 degrees F or under the broiler for 8-10 minutes, basting the skewers with sauce halfway through cooking.