Ingredients

1 onion, peeled, cut into 8 wedges

1 rib celery, cut into 4 pieces

1 carrot, cut into 4 pieces

3 sprigs fresh flat-leaf parsley

2 bay leaves

1 teaspoon whole black peppercorns

Zest of 1 orange

1/2 cup white wine

2 one-pound monkfish fillets, skin and black membranes removed

2 oranges, segmented, juice reserved

2 ounces Kalamata olives (about 1/2 cup), cut into quarters lengthwise

1 medium red onion, peeled, cut into 1/2-inch-wide slivers

Preparation

Place onion, celery, carrot, parsley, bay leaves, peppercorns, zest, and wine in a wide shallow saucepan with 6 cups water. Bring to a boil; reduce to a simmer. Cook 20 minutes to allow flavors to blend. Strain; discard solids. Return court-bouillon to pan.

Bring court-bouillon to a boil; reduce to just simmering. Place fish in stock (it will be partly submerged); top with oranges, olives, and red onion. Cover; cook until fish is just cooked through, about 10 minutes.

Transfer fish with a spatula or slotted spoon to serving platter with oranges, olives, and onion. Serve immediately.