Honey Lime-Glazed Grilled Ahi Tuna

 2 limes, juiced
1/4 cup olive oil
2 tablespoons​ rice vinegar
2 cloves garlic, crushed and minced
1 tablespoon grated​ 
fresh ginger
4 6-ounce Ahi tuna fillets
Optional: Salt and fresh-ground black pepper to taste
1/4 cup honey 

In a bowl, whisk together the lime juice, olive oil, rice vinegar, garlic, and ginger.

Lay the tuna fillets on a plate, season with salt and fresh-ground black pepper to taste, and spoon over half of the glaze, turning to coat evenly.

Let the tuna fillets marinate for 30 minutes in the refrigerator.

Add the honey to the remaining half of the glaze and mix well.

Heat an outdoor grill on high or make a hot fire in a charcoal grill.

When the grates are hot, lightly oil them and place tuna fillets on the grill. Cook for about 2 minutes and turn them over, brushing the glaze over the cooked side. Grill 2 minutes more for medium-rare to medium.

When the fish is cooked, transfer it to a plate and brush the honey lime glaze over the other side of the fillet.

Serve immediately with any remaining glaze.