Maple Glazed Barbecued Chicken

1 onion, roughly chopped
1 cup ketchup
1/4 cup Worcestershire sauce
1 teaspoon Dijon mustard
1 teaspoon hot sauce
1/2 cup cider vinegar
1/2 cup maple syrup
6 boneless, skinless chicken breasts, about 4 to 6 ounces each

1. To make the barbecue sauce, place all of the ingredients except the chicken in a blender or food processor. Blend until thoroughly combined.

2. Marinate the chicken in half of the sauce while you preheat the grill to medium-high.

3. Remove the chicken from the marinade and place it on the hot grill. Brush the chicken occasionally with the remaining half of the sauce. (Discard the excess sauce that the raw chicken was marinating in.) Grill the chicken for about 4 to 6 minutes on each side, until it is cooked through.