Cut a lemon slice and place it on top of the fish. Cut the onion into rings and sauté them in a pan with some olive oil and sprinkle with thyme. Cook for 1 minute. Add the fish, cover the pan, and cook over low heat for 15 minutes or until the fish is cooked to your liking.
Cover the pan and simmer over low heat for 15 minutes or until the fish is cooked to your liking.
Cut a lemon slice and place it on top of the fish. Cut the onion into rings and sauté them in a pan with some olive oil and sprinkle with thyme. Cook for 1 minute. Add the fish, cover the pan, and cook over low heat for 15 minutes or until the fish is cooked to your liking.
Cover the pan and simmer over low heat for 15 minutes or until the fish is cooked to your liking.