Grilled Marlin with lime-butter sauce

Blue Marlin steaks
3 T. butter
1/4 red onion or 1/2 shallot, chopped
1/4 C. white wine
2 limes, juiced
1 T. capers, drained

Salt and pepper Blue Marlin steaks to taste and spritz with some lime juice.  Grill over medium-high heat until cooked to desired doneness.

While blue marlin is cooking, saute onions/shallots in butter until soft.  Add lime juice and wine, reduce by half.  Add capers and continue reducing until little to no liquid remains.  Serve on top of marlin.