Steps
1. Heat olive oil in a skillet over medium heat.
2. Season the fish fillet with salt and pepper, then sear it skin-side down for 3-4 minutes until golden.
3. Flip the fish and add butter and minced garlic to the pan.
4. Pour in white wine and lemon juice, letting it simmer for 2 minutes.
5. Add the cleaned mussels to the skillet, cover, and cook for 5-6 minutes until the mussels open.
6. Discard any unopened mussels.
7. Sprinkle chopped parsley over the dish and spoon the garlic butter sauce over the fish and mussels.
8. Serve immediately with crusty bread or steamed vegetables.