Lemon juice, a little olive oil and some ginger and black pepper. Grill 45 seconds on each side over hot coals. Serve with some asparagus and good white wine. Thank me later.
Cooking a tuna steak for any more than 30 seconds per side will make cat food!!! RARE and COLD on the inside is the only way to do it. Olive oil and a little Tony's and let er rip!