Melt a large tablespoonful of butter in a saucepan over the fire, when
it bubbles put into it a small onion and half a green pepper, if
convenient, chopped very fine. Simmer gently for a few minutes, then
stir in a heaping teaspoonful of flour, and add four nice, fresh
tomatoes peeled and cut small--canned tomatoes may be used--a gill of
vegetable stock, a clove and part of a bay leaf, and pepper and salt to
taste. Let it cook gently for half an hour and press through a fine
sieve.