Bourbon Flank Steak with Mango Ginger Salsa

First combine marinade ingredients in a large zip-top bag; add flank steak, seal bag and turn to coat. Place in refrigerator and marinate 2 to 8 hours. Next, to prepare salsa, combine ingredients in a small bowl; set aside. Salsa can be prepared up to one day ahead; bring to room temperature before serving. Last, preheat grill to high heat. Place flank steak on grates; close lid and grill 6 minutes. Turn steak, grilling on the other side an additional 5 minutes. Using parking knife, cut a small slit in the thickest part of the meat to check for doneness. Meat should be rare, bu ti fit requires a longer cooking time, place back on the grill with the thinner end of the steak over indirect heat. Continue cooking 1 to 2 minutes. Transfer meat to cutting board; cover loosely with foil and let rest 5 to 10 minutes. Slice thinly, on the bias against the grain. Note, to cook indoors, put flank steak in grill pan and cook over medium-high heat 4 to 4 minutes per side. Transfer to a 450 degree oven and roast about 5 minutes.