How to Make It
Sprinkle lamb evenly with salt and pepper; let stand 10 minutes. Combine juice, 3/4 cup mint, 1/4 cup oil, garlic, and anchovies in a large zip-top plastic bag. Add lamb to bag; toss to coat. Refrigerate at least 4 hours and up to 24 hours, turning occasionally.
Remove grill rack from grill; set aside. Prepare grill for indirect grilling, heating one side to high (if using a gas grill, heat other side to medium). Add wood chips directly to flames. Coat grill rack with cooking spray; place grill rack on grill.
Remove lamb from marinade; discard marinade. Add lamb over hot side of grill. Cover and grill 8 minutes or until lamb is lightly charred. Turn lamb over, and place on cooler side of grill; cover and grill 4 to 6 minutes or until desired degree of doneness. Remove from grill; let stand 15 minutes. Cut lamb across the grain into thin slices; place on serving platter. Drizzle slices with remaining 2 tablespoons olive oil; sprinkle with remaining mint leaves.