Rosemary-Lemon Grilled Ahi Tuna

Ingredients:
For the marinade:
6 lemons, cut in 1/2
Salt and freshly ground black pepper
2 teaspoons finely chopped garlic
2/3 cup extra-virgin olive oil
1/3 cup fresh rosemary leaves, chopped

To make the marinade:
Directions:
Preheat broiler. Place lemons, cut side up,
in a small, non-aluminum baking dish and sprinkle with salt and pepper.
Roast, about 6 inches below the heat, until very soft, about 20 minutes. The tops will darken and caramelize. Let cool in the baking dish.
Squeeze the lemon pulp and juice and scrape all the cooking juices from the baking dish into a strainer supported over a bowl.
Force it through and add garlic.
Whisk in rosemary and extra-virgin olive oil.
Keeps up to 1 week refrigerated in a tightly sealed container.

Directions:
Preheat grill or broiler. Grill or broil tuna pieces and brush with marinade. Season with salt and pepper and grill, turning once or twice,
to medium rare, 8 to 10 minutes, depending on heat. Serve immediately.