1/4 cup olive oil 
2 tablespoons red wine vinegar
2 tablespoons chopped fresh basil
2 teaspoons chopped fresh thyme
2 teaspoons dried tarragon
2 large garlic cloves, finely chopped
1/3 cup mayonnaise
4 7-ounce tuna steaks (each about 1 inch thick)

Directions
To make the aioli, whisk together first 6 ingredients in shallow dish for marinade. In a separate bowl, mix mayonnaise and 1 ½  tablespoons marinade. Set aioli aside.

Sprinkle fish with salt and pepper. Place in dish and pour marinade on top; turning fish to coat evenly.

Marinate 1 hour at room temperature, turning fish occasionally.

Oil grill rack and turn grill on to medium-high heat. Once grill is hot, grill fish to desired doneness, about 3 minutes per side for medium.

Top fish with aioli and serve.

Author: Bon Appétit
Prep Time: 60 minutes (for fish to marinate)
Total Time: 10 minutes (excluding marinating time)
Yield: 4 servings