Brine chicken as directed.Remove chicken from brine solution and blot dry with a paper towels. Combine ground Szechuan peppers with onion and garlic powders.. Aplpy seasoning evenly to wings.
Heat grill to around 325 degrees F.
Place onto the grill and cook wings for 30-35 minutes, or until they reach an internal temperature reaches 170-175 degrees F.
To make sauce--bring soy sauce, red wine vinegar, balsamic, brown sugar, garlic, and ginger to a simmer over medium heat, for 1-2 minutes. Stir.
Combine cornstarch with chicken broth and add to mixture. Increase heat to medium-high and whisk together until thick. Reduce heat to low, and let the sauce simmer for 1-2 minutes, stirring often. Remove pot from heat, cover and keep warm.
Remove wings from grill and place it into a disposable aluminum pan or grill safe pan. Increase the heat of your grill to 450 degreesPour Szechuan sauce over cooked wings. Toss to coat. and place the pan with wings back onto the grill. Cook for 5-7 more minutes. Watch for burning.Remove pan from grill, top with garnish, and serve these delicious smoky Szechuan chicken wings!