Grilled Tuna with Tarragon Mayonnaise

1. 1

   Whisk 1/4 cup oil, lemon juice, yolks and water in small metal bowl.

2. 2

   Set bowl over saucepan of barely simmering water (do not allow bottom of bowl to touch water); whisk constantly until thermometer maintains 140F for 3 minutes, about 6 minutes total.

3. 3

   Transfer to processor.

4. 4

   With machine running, very gradually add 1/2 cup oil in thin steady stream (if oil is added too quickly, the mayonnaise will separate and become runny).

5. 5

   Mix in chopped tarragon.

6. 6

   Season with salt and pepper.

7. 7

   (Can be made 1 day ahead.

8. 8

   Cover and refrigerate.)

9. 9

   Prepare barbecue (medium-high heat) or preheat broiler.

10. 10

    Drizzle additional oil over fish.

11. 11

    Sprinkle with salt and pepper.

12. 12

    Grill or broil about 3 minutes per side for medium.

13. 13

    Transfer to plates.

14. 14

    Top with mayonnaise.

15. 15

    Garnish with tarragon sprigs.

* Per serving · 4 servings · Values may vary.