Ingredients

cupflat leaf parsley leaves,lightly packed

3tbspcapers,drained

1clovegarlic

4tsplemon juice

1tspanchovy paste

½tspdijon mustard

¾tspsalt

¼tspfresh ground black pepper

½cupolive oil,(plus 1 tbsp)

4tuna steaks

1avocado

Preparation

Put the parsley, capers, garlic, lemon juice, anchovy paste, mustard, salt and pepper into a food processor.

Pulse to chop, six to eight times.

With the machine running, add the ½ cup oil in a thin stream to make a coarse puree.

Leave the sauce in the food processor and, if necessary, pulse to re-emulsify just before serving.

Heat a grill pan or heavy cast-iron pan over moderately high heat.

Rub the tuna steaks all over with the 1 tablespoon oil.

Sprinkle with salt and pepper.

Cook the fish for 3 minutes.

Turn and cook until done to taste, which can be 3 to 4 minutes longer for medium-rare.

To serve, top the tuna steaks with the avocado and drizzle with the sauce.