Grilled wings marinated in mango, tamarind, serrano pepper, garlic, soy sauce, onion powder, chili powder.
Let's start off by making the marinade. In a small food processor, add your mango, serrano pepper, and garlic. Whiz it all up. Add to your chicken along with the remainder of the ingredients - oil, soy sauce, salt, tamarind concentrate, onion powder, chili powder. Cover and marinate in the fridge for a few hours. (Note - the amount of tamarind you add may vary depending on if you are using fresh tamarind from the block or can also depend on the brand of concentrate of pulp. Some are more concentrated and hence more sour than others. Always taste before adding.)
Fire your grill up and grill on both sides. Baste with leftover marinade and/or melted butter and oil. The crust should char up a bit. Usually it takes about 8-10 minutes per side (depending on how hot your grill is). The internal temp should reach around 170-175 F. Serve with store-bought or homemade ranch dressing.