Seared tuna with oriental citrus sauce mirabe

1. Available at asian markets and many specialty foods shops and supermarkets note: can be prepared in 45 minutes or less.
2. make sauce in a large saucepan combine citrus juices, tamari or soy sauce, vinegar, oil, and gingerroot and simmer 15 minutes.
3. Pour sauce through a fine sieve into a bowl.
4. Saucei may be made 1 day ahead and chilled, covered.
5. Reheat sauce before preceeding.
6. preheat oven to 400°F.
7. in a large non-stick skillet heat oil over moderately high heat until hot but not smoking.
8. Coat 2 tuna steaks with sesame seeds and sear 1 minute on each side, transferring to a baking sheet.
9. Coat and sear remaining 4 tuna steaks in batches in same manner.
10. Cook tuna in middle of oven 3 minutes for medium-rare.
11. cut each tuna steak into 4 slices and arrange slices, cut sides up, on 6 plates.
12. Pour about ¼ cup sauce around tuna on each plate.
13. serves 6.