2 tablespoons olive oil
1 onion, thinly sliced
2 cloves garlic, minced
1 (14.5 ounce) can diced tomatoes
1/2 cup black olives, pitted and sliced
1 tablespoon chopped fresh parsley
1/2 cup dry white wine
1 pound cod fillets
In a large frying pan, heat oil over medium heat. Saute onions and garlic in olive oil until softened.
Stir in tomatoes, olives, parsley, and wine. Simmer for 5 minutes.
Place fillets in sauce. Simmer for about 5 more minutes, or until fish turns white.