Salsa: In a large bowl combine black beans mango onion pepper cilantro orange juice olive oil and OLD BAY. Refrigerate until ready to serve.
Mix 1/4 cup oil and 1 tablespoon OLD BAY in small bowl. Brush onto both sides of tuna.
Grill over medium heat 5 to 6 minutes per side or until desired doneness. (Tuna is more moist when its center is still rosy-pink after cooking.) To serve place tuna on a bed of salsa. Garnish each serving with endive leaves and basil.
Alternative: Tuna may also be cooked in a preheated grill pan. Cook on medium-high heat 5 to 6 minutes per side or until desired doneness.