grilled wasabi tuna

this is a nice easy dish that i adapted from cooking light

• Ready In: 30 mins
• Serves: 4

Ingredients

• 2  teaspoons  toasted sesame seeds
• 2  teaspoons wasabi powder
• 2  teaspoons ground pepper
• 1  teaspoon garlic powder
• 1  pinch salt
• 4 (6 ounce)  tuna steaks
• 1  tablespoon wasabi powder
• 1  tablespoon water
• 1⁄4 cup mayonnaise
• 1⁄4 cup sour cream
• 1  tablespoon lemon juice
• 1  tablespoon soy sauce
• 2  tablespoons  sliced scallions

Directions

1. combine first 5 ingredients, rub over tuna, chill for 30 minutes.
2. heat grill to high.
3. grill tuna aprox 5 mins per side, to taste- (i like mine cooked 7-10 mins per side, well done).
4. combine remaining ingredients by whisking together, serve alongside tuna.