For best results, use sushi-grade ahi tuna to ensure the highest quality and safety. Adjust the searing time based on your desired level of doneness. For a more well-done tuna, sear for an additional 30 seconds to 1 minute per side. Serve this dish immediately after searing to enjoy the contrast between the warm, seared exterior and the cool, flavorful interior. Pair with a crisp white wine, a passion fruit cocktail, or a refreshing passion fruit lemonade to complement the flavors of the dish.