Seared Ahi tuna dinner

I bought a frozen Ahi tuna steak from Trader Joe's, and it turned out great. I thawed it, then marinated for 30 minutes in lemon juice, olive oil, and soy sauce. I cooked it about 3 minutes per side on the grill. The charcoal seemed a little cool, so I might only cook 2 minutes per side over a hot fire. This leaves the inner third of the fish's thickness raw and very tasty!