Marinate the wings to your liking and place in a mold or tray. Pour the tamarind juice over the wings. Cover and refrigerate for several hours.
Make the sauce. In a medium saucepan add 6 ounces of the tamarind juice and the rest of the sauce ingredients, except the cornstarch, and heat to a boil. Meanwhile, in a container or small cup, mix the cornstarch with 2 ounces of the tamarind juice, pour into the saucepan, and mix constantly until thick. Remove from the burner and set aside.
Baking the wings: Heat the oven to 350 degrees. Drain the wings and place on a baking sheet. Bake the wings for 50-60 minutes. Ten minutes before removing from the oven, spread the sauce over the wings and finish baking.
Serve the wings accompanied with the remaining sauce !!!
NOTE: You can marinate the wings with garlic, ginger and soy sauce.