Generous pinch dry mustard or 1 level teaspoonFrench mustard
Salt and pepper
4fl oz (125ml) white sauce
4tablespoonsfresh white breadcrumbs
1oz (25g) butter
Scrub the crab shells. Mix all the ingredients except the buttered crumbs together. Check the seasoning and adjust if necessary. Pack into the shells, top with the crumbs and dot with butter. Bake in the oven at gas mark 6, 400°F (200°C), for about 20 minutes, until heated through and brown on top.