This takes a while, but is so good on steak or salmon.
Jack Daniel's Marinade and Dipping Sauce
1/3 cup diced red onion
1/2 tsp finely-diced garlic
1/2 cup water
1/2 cup brown sugar
1/4 cup soy sauce
1/3 cup white grape juice
1/2 cup Jack Daniel's black label bourbon
Place ingredients in sauce pan, mix and stir. Bring to a boil, then simmer 35 to 45 minutes to reduce. It should have reduced in volume by about 1/4 to 1/3.