3 tablespoons olive oil
1 large fennel bulb, thinly sliced
1 onion, chopped
3 large shallots, chopped
2 teaspoons salt
4 large garlic cloves, finely chopped
3/4 teaspoon dried crushed red pepper flakes, plus more to taste
1/4 cup tomato paste
1 (28-ounce) can diced tomatoes in juice
1 1/2 cups dry white wine
5 cups fish stock
1 bay leaf
1 pound manila clams, scrubbed
1 pound mussels, scrubbed, debearded
1 pound uncooked large shrimp, peeled and deveined
1 1/2 pounds assorted firm-fleshed fish fillets such as halibut or salmon, cut into 2-inch chunks

Read more at: http://www.foodnetwork.com/recipes/giada-de-lauren...