Cod with Chorizo and Breadcrumbs

Name: Cod with Chorizo and Breadcrumbs
Ingredients: 4 Tbsp. olive oil, divided; Kosher salt and freshly ground black pepper; 1 Tbsp. chopped fresh flat-leaf parsley; 1 Tbsp. fresh oregano leaves; 1 small shallot, thinly sliced; 2 oz. smoked Spanish chorizo, halved, thinly sliced; 2 Tbsp. Sherry or red wine vinegar; 4 6-oz. pieces skinless cod or halibut fillets; 2 3/4-inch-thick slices country-style bread, crusts removed