Grilled Lime Ahi w/ Dill Lemon Sauce

1/4 cup olive oil
1/4 cup lime juice
1/8 cup balsamic vinegar
2 cloves garlic, minced
1 tablespoon minced fresh ginger root
1 pound yellowfin tuna fillets
1/4 cup sour cream
1/4 cup low fat plain yogurt
chopped dill
1/2 lemon, juiced

In a medium bowl, mix together 1/4 cup olive oil, lime juice, balsamic vinegar, garlic, and ginger. Add tuna fillets, and turn to coat evenly. Let marinate for several hours in the refrigerator.

Mix together 1/4 cup sour cream and 1/4 cup plain low fat yogurt. Chop dill and add to mix. Add in juice of 1/2 lemon, then a pinch of salt and pepper. Refrigerate until fish is done.

Preheat grill for high heat and lightly oil grate.
When grill is hot, reduce heat place tuna fillets on grate. Grill until cooked to desired doneness.