Bourbon Grilled Chicken - Orange-Flavored

1/2 cup chopped onion

2 cloves garlic -- minced

1 tablespoon olive oil

2 teaspoons orange zest

1/3 cup orange juice

1 tablespoon wine vinegar -- balsamic is better

1/3 cup bourbon whiskey

1/2 cup molasses

1/2 cup catsup

1 tablespoon steak sauce

1/4 teaspoon dry mustard salt and freshly ground black pepper -- to taste Tabasco -- to taste

1 teaspoon chili powder

1 pinch cloves