Promised tuna

So I promised my seared tuna and sauteed spinach recipe from two Sundays back. Really easy. The key is good quality, fresh yellowfin or other meaty tuna in a nice thick fillet. If you're in NY, Fairway usually has reliable fish, or find Blue Moon Fish at one of several Greenmarkets. (Get there early, as they sell out fast!) If you're elsewhere and financially flush, Whole Foods is usually a good bet as well.
Combine 4 tbsp. soy sauce, 2 tbsp. honey, 2 tbsp. fresh squeezed lime juice, and some cracked black pepper in a dish, and microwave just slightly to melt the honey so it all dissolves together. Rinse and dry the tuna and marinate for 30 minutes in the soy-honey sauce. Heat oil (grapeseed or olive is fine) in a cast iron skillet (where would I be without mine?) over high heat until it starts to smoke. Drop the tuna in the pan and sear for about 2-1/2 minutes, turn and sear the other side for 2 minutes. The fish should have a nice seared glaze  about 1/4 deep and still be rare in the middle. Or better yet use an instant read thermometer to 120 degrees for rare, 125 for medium-rare.
The spinach is similar to last time, but in this case I toasted almonds, added spinach and some other mixed greens and finished with sweet lime juice. I always finish sauteed spinach with vinegar or citrus-- the last post explained about chelating agents which help capture iron. In this case the acid in vinegar or citrus helps your body absorb more iron from the spinach. And lime juice and balsamic vinegar both taste great anyway so it's a win-win.
As I mentioned, this paired well with a 2003 Val di Suga Brunello. Brunello di Montalcino, to use its full name, is one of the various "super Tuscan" wines, often with super (high) prices. But I found it several months back on wtso.com for about $30 a bottle. It's a bargain at that price-- luscious with dark cherry, soft, ripe tannin structure and some balanced acidity (hence the fish pairing), with coffee and more cherry in the finish. It normally retails for $57, which would be less of a value.