Ingredients 4 fillets of cod or other firm white fish, about 6 ounces each 1 tablespoon butter 1 tablespoon olive oil 1 onion 1 tomato 1 tablespoon chopped fresh oregano , or 1 teaspoon dried 1/2 cup dry white wine salt and pepper     Directions PREP 15 mins COOK 15 mins READY IN 30...