1In a large non-reactive dish, mix together the orange juice, soy sauce, olive oil, lemon juice, parsley, garlic, oregano, and pepper. Place the tuna steaks in the marinade and turn to coat. Cover, and refrigerate for at least 30 minutes.
2Preheat grill for high heat.
3Lightly oil grill grate. Cook the tuna steaks for 5 to 6 minutes, then turn and baste with the marinade. Cook for an additional 5 minutes, or to desired doneness. Discard any remaining marinade.
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.