Infuse tuna steaks with amazing fresh-off-the-grill flavor with this easy smoked tuna recipe. For more fish meal ideas, see our complete collection of fish recipes.
Soak wood chunks in water to cover at least 30 minutes.
Place tuna steaks in a large heavy-duty zip-top plastic bag. Stir together 2 quarts water and next 4 ingredients; pour over steaks. Seal bag; chill 3 hours, turning bag occasionally.
Remove steaks from brine. Wash and pat dry. Place on a rack to air dry 30 minutes. Brush with vegetable oil. Pat pepper on both sides of fillet.
Prepare charcoal fire in smoker; let burn 15 to 20 minutes. Drain wood chunks, and place on coals. Place water pan in smoker; add wine. Coat rack with cooking spray; place in smoker. Place steaks on upper rack; cover with smoker lid. Cook 3 to 4 hours or until fish flakes easily when tested with a fork.