- Combine sesame seed, bread crumbs, onion powder and pepper in shallow pan or plate.
- Melt margarine in small skillet; remove from heat and stir in soy sauce. Coat both sides of chicken, 1 piece at a time, with margarine mixture, then with sesame seed mixture. Arrange chicken, side by side, on large rack on foil-lined baking pan.
- Bake in 375ºF. oven 20 minutes, or until no longer pink in center.
- Meanwhile, combine sweet & sour sauce, brown sugar and 3 Tbsp. water in small saucepan. Cook, stirring, over medium heat until mixture boils. Remove from heat; stir in sesame oil.
- Serve sauce with chicken.