This Orange-Rosemary Tuna recipe is a refreshing and flavorful dish that combines the citrusy tang of oranges with the aromatic taste of rosemary. The tuna is marinated in a zesty orange and rosemary marinade, then grilled to perfection. The result is a juicy and tender tuna steak with a burst of citrus and herb flavors. Serve it with a side of roasted vegetables or a fresh salad for a light and healthy meal.