From the Pacific Rim, here's a "London broil" with piquant Asian influences. A cool bite of wasabi dressing finishes the dish.
Combine first 5 ingredients; rub over tuna. Cover and chill 30 minutes. Combine wasabi and water. Let stand 5 minutes. Stir in mayonnaise, sour cream, juice, and soy sauce.
Prepare grill to high heat.
Place steaks on grill rack coated with cooking spray; grill 5 minutes on each side or until desired degree of doneness. Serve with wasabi cream; sprinkle with onions.
Recipes adapted from Steven Raichlen's books How to Grill (Workman, 2001) and BBQ USA (Workman, 2003)
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