1 Little Gem lettuce, shredded into 1cm/½in strips
1 avocado, peeled, stone removed, thinly sliced
cress or micro herbs, to garnish (optional)
10cm/4in piece cucumber, cut in half lengthways and sliced thinly
1–2 tsp lemon juice
4 radishes, trimmed and finely sliced
1 tbsp tomato ketchup
3–4 tbsp mayonnaise
mustard, any type, to garnish (optional)
1–2 tsp Worcestershire sauce
dash Tabasco
salt and freshly ground black pepper
good pinch paprika, to garnish
250g/9oz North Atlantic prawns, peeled and cooked
8 small brioche finger rolls, each halved and then cut in half on the top but not all the way through