Ingredients

1/4 cup extra-virgin olive oil, plus more for rubbing

4 tender celery ribs, diced (1 cup)

1 onion, finely chopped

3 garlic cloves, thinly sliced

1/2 cup prepared tomato sauce

1/2 cup dry white wine

1/4 cup white wine vinegar

1/2 pound marinated artichoke hearts, drained and chopped

1/2 cup pitted green olives, chopped

1/4 cup pine nuts

3 tablespoons sugar

2 tablespoons small capers, drained

Kosher salt and freshly ground pepper

3 tablespoons shredded basil

Six 7-ounce skinless mahimahi fillets

Preparation

In a large, deep skillet, heat the 1/4 cup of olive oil until shimmering. Add the celery, onion and garlic and cook over moderate heat until just softened, 4 minutes. Add the tomato sauce, wine, vinegar, artichokes, olives, pine nuts, sugar and capers and season with salt and pepper. Simmer until the vegetables are tender and the liquid is reduced, 8 minutes. Stir in the basil and let cool. 2. Light a grill or preheat a grill pan. Rub the fish with olive oil and season with salt and pepper. Grill over moderately high heat, turning once, until cooked through, about 9 minutes. Transfer the fish to plates, top with the caponata and serve.

Make Ahead The artichoke caponata can be refrigerated for up to 3 days.