Ingredients

2 tablespoons extra-virgin olive oil

1 medium onion, cut into 1/4-inch dice

4 garlic cloves, smashed and peeled

3 sprigs fresh thyme

1 teaspoon coarse salt

1/4 teaspoon freshly ground pepper

1/8 teaspoon crushed red-pepper flakes

1 cup dry white wine, such as Chardonnay

1 can (14 ounces) diced tomatoes with juices

2 1/2 cups water

14 mussels, debearded and scrubbed well

14 littleneck clams, scrubbed well

1 pound firm, white fish fillets, such as halibut or cod, cut into 2-inch pieces

Fresh flat-leaf parsley leaves, for garnish

Preparation

Heat oil in a large pot over medium-high heat. Add onion and garlic, and cook for 4 minutes. Add thyme, salt, pepper, and red-pepper flakes, and cook for 1 minute. Add wine, and simmer for 1 minute. Stir in tomatoes, juices, and water. Cover, and simmer for 25 minutes. Add seafood, cover, and cook until shells open, 6 to 8 minutes. (Discard unopened shells and thyme sprigs.) Garnish with parsley, and serve immediately.