In a small saucepan combine the brown sugar, hoisin sauce, garlic, white wine vinegar, soy sauce, honey, rice vinegar, sesame oil, sambal oelek chili paste, and red chili flakes.
Cube up your chicken breasts into ~1” pieces and toss them with some salt and pepper, around ½ a teaspoon of each. Set that aside for a second and get the rest of your “breading station” ready.