Grilled BBQ Chicken

1 1/2 TBS olive oil
1/4 cup diced onion
2 cloves garlic, minced
5 TBS ketchup
3 TBS honey
3 TBS brown sugar
2 TBS apple cider vinegar
1 TBS Worcestershire sacue
salt and pepper to taste
2 chicken breast halves
-- Preheat grill for med-high heat. Heat olive oil in a skillet over med high heat. Saute onion and garlic until tender. Stir in ketchup, honey, brown sugar, apple cider vinegar, Worcestershire sauce, salt and pepper. Cook for a few minutes to thicken sauce. Remove from heat, and allow to cool. Lightly oil the grill grate. Dip chicken in sauce, turn to coat. Cook on grill for 15 minutes, or until no longer pink. ** I stopped there** But the recipe says to move chicken to skillet with sauce. Simmer over med heat for about 5 min per side. **Whot puts chicken back in the raw chicken marinade? Sounded too iffy for me so I grilled it and ate it and it was good, flavorful so I didnt do the rest.**