Cioppino

Name: Cioppino
Prep time: 45 min
Cook time: 1 h
Total time: 1 h 45 min
Cuisine: American, Italian
Ingredients: ¼ cup + 2 tablespoons extra-virgin olive oil, (divided); 2/3 cup finely chopped shallots, (from about 3 shallots); 3 cloves garlic, (minced); 1 cup white wine; 1 (28-oz) can crushed tomatoes; 2 (8-oz) bottles clam juice; 2 teaspoons sugar; 1¾ teaspoons salt, (divided); ½ teaspoon crushed red pepper flakes; ½ teaspoon dried oregano; 7 sprigs fresh thyme, (plus 1 teaspoon fresh chopped thyme); 1½ lbs firm-fleshed fish fillets, (such as halibut, cod, salmon, snapper, etc., cut into 2-in (5-cm) pieces); 3 tablespoons unsalted butter; 1½ lbs (about 18) littleneck clams, scrubbed (see note); 1½ lbs extra large raw shrimp, (peeled and deveined); Fresh chopped Italian parsley, (for garnish (optional))