Mackerel baked in foil

Ingredients

2 whole mackerel
1 lemon
4 fresh rosemary sprigs
2 garlic cloves, sliced
1 small red onion, thinly sliced
4 tbsp cider or apple juice
boiled potatoes
roughly chopped parsley, to serve
salt and freshly ground black pepper

Method

1. Preheat the oven to 200C/400F/Gas 6 or fan oven 180C/350F/Gas 4 from cold.
2. Put each fish on a large square of tin foil or baking paper on a baking sheet. Season the fish inside and out with salt and pepper.
3. Slice the lemon, then cut each slice in half. Tuck the lemon slices inside each fish with a couple of rosemary sprigs and a few garlic slices.
4. Scatter over the onion and pour 2 tbsp of cider or apple juice over each fish.
5. Wrap thtin foil or baking paper loosely around each fish to make a parcel, and bake for 25 minutes.
6. Serve with boiled potatoes sprinkled with parsley.