Honey Bourbon Pork Tenderloin

3 12-ounce pork tenderloins
1 cup water
1/2 cup onion, chopped
1/2 cup lemon juice
1/2 cup bourbon
1/4 cup honey
1/4 cup soy sauce
3 tablespoons flour
2 tablespoons olive oil
1 tablespoon gingerroot, minced
5 cloves garlic, minced
1/2 teaspoon salt
1/2 teaspoon pepper

Combine onion, lemon juice, bourbon, honey, soy sauce, ginger, garlic and olive oil. Mix well. Place tenderloins in a resealable bag and pour marinade over. Seal and turn to coat. Let sit for 30 minutes. Preheat grill. Remove tenderloins from marinade and pour marinade into a saucepan. Season pork with salt and pepper and grill over a low fire for about 30 minutes or until done. Meanwhile add water and flour to marinade and bring to a boil. Reduce heat and simmer until thickened. When the tenderloin is done remove from grill and cut into 1/2 inch slices. Serve with sauce poured over top.