The tuna took about 5 minutes total to sear, so consider making this the absolute last thing you do before sitting down to eat. Make sure everything is on the table, glasses are full, and guests/family members are seated. You will definitely want to eat the tuna hot, hot, hot.
Serve with a side of steamed broccoli or swiss chard...a little basmati rice might be nice too, especially if you own a rice cooker.
All in all a delicious, easy, and fast recipe.
p.s. I found as-fresh-as-you-can-in-Utah ahi tuna at my local Costco.
picture via the Barefoot Contessa at Home cookbook