This was good and easy!

Teriyaki Chicken
1 lb boneless skinless chicken breasts
1/2 c. ketchup
2 TB brown sugar
2 TB vinegar
2 TB teriyaki sauce
1 tsp dry mustard

Preheat oven to 375*. Spray 8×8 inch pan with cooking spray; place chicken in pan. Mix ketchup, brown sugar, vinegar, teriyaki sauce and mustard together and pour over chicken. Bake 40 minutes or until done.
Yield: 4 servings.