1/4 cup mixed fresh citrus juice (we used equal parts grapefruit, lemon and lime juice)
2 tablespoons tamari or soy sauce
2 tablespoons mirin
1 teaspoon toasted sesame oil
3/4 pound highest-quality fresh Ahi tuna, cut into 1/2 inch pieces
2 scallions thinly sliced
1 avocado chopped
1 jalapeño thinly sliced
Combine citrus juice, tamari, mirin, and sesame oil in a large bowl and set aside.
Toss Ahi tuna, scallions and jalapenos in the sauce and let marinade for 30-60 minutes. Just before serving toss in avocado and serve with suggestions above.