- 1/2 cup mayonnaise
- 2 tablespoons minced green onions (white and green parts)
- 1 teaspoon (or more) wasabi paste
- 2 tablespoons teriyaki sauce
- 1 tablespoon soy sauce
- 1 tablespoon unseasoned rice vinegar
- 4 8-ounce tuna steaks (preferably ahi; each about 1 inch thick)
- Vegetable oil
- Whisk first 3 ingredients in small bowl to blend, adding more wasabi paste if desired. Cover and refrigerate.
- Whisk teriyaki sauce, soy sauce, and rice vinegar in small bowl to blend. Place tuna steaks in resealable plastic bag. Add teriyaki mixture; seal bag. Turn bag to coat. Let stand at room temperature 30 minutes, turning bag occasionally.
- Brush grill with vegetable oil. Prepare barbecue (medium-high heat). Drain tuna steaks. Grill tuna to desired doneness, about 4 minutes per side for medium. Top each tuna steak with about 2 tablespoons wasabi mayonnaise and serve.