Place chicken breasts in gallon sized Ziploc bag, add marinade ingredients (ginger, bay leaf, apple juice, apple cider vinegar, onion flakes) and freeze.
On a separate bag, mix ingredients for sauce (brown sugar, chili powder, salt, pepper, Dijon mustard, chili sauce, soy sauce, apple cider vinegar). Freeze.
Thaw chicken and sauce.
Remove chicken from marinade & discard marinade.
Heat large frying pan with 2 teaspoons oil over high heat.
Brown chicken for 2-3 minutes per side.
Add sauce, reduce heat to low, and simmer, uncovered, for 5-7 minutes.