A few herbs, some good oil or butter, a tin of anchovies, salty cured black olives from Europe, tins of plain, unadorned whole tomatoes (until our own great ones come along in late July), a chunk of Parmesan — these are a few essentials to keep in the store cupboard and fridge during houseguest season. Pasta, which can be stored indefinitely either frozen or dry, seems to me one of the most suitable and least painful ways of dealing with unplanned meals.