Mix together butter, 2 tb lemon juice, lemon zest, mustard, and
capers. Set aside.
Prepare a hot fire. Brush tuna steaks with oil. Drizzle remaining 1
tb lemon juice over fish. Place steaks on a oiled grill set 4 to 6
inches from coals. Grill, turning once, until firm and opaque at
center, about 10 to 12 minutes.
Remove from heat and top each steak with 1 tb lemon-caper butter.
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Per serving (excluding unknown items): 472 Calories;
34 g Fat (65% calories from fat); 40 g Protein; 1 g Carbohydrate;
108 mg Cholesterol; 98 mg Sodium