Preheat the oven to 200℃/180F/Gas mark 6.
Place the fillets of cod on a large baking sheet. Season with salt and pepper and rub with garlic.
Place the cod in a single layer in a baking dish, along with the olive oil.
Add the beans, 2 tablespoons water and a squeeze of lemon juice to the baking dish.
Pour the wine over the fillets and cut the lemon slices in half to tuck under the fish.
Cook in a preheated oven at 200c for 10-12 minutes until cooked to your liking.
Serving Suggestions: Squeeze the lemon juice over the top, sprinkle with chopped parsley and smoked paprika and serve with the butter beans and tomatoes on the vine.