dill, chopped, to garnish
3 garlic cloves, finely chopped
1 lemon, juice only, to serve
½ head frissee lettuce, inner leaves removed
250g/9oz potatoes (such as Rooster), peeled and grated
1 tsp Dijon mustard
250g/9oz colcannon or mashed potato
100²µ/3½´Ç³ú plain flour
sea salt and freshly ground black pepper
2–3 tbsp olive oil
3 tbsp olive oil
rapeseed oil, for frying
1 tbsp white wine vinegar
knob of butter
125ml/4fl oz milk
4 small mackerel, gutted and butterflied or filleted