Walk along any street in France and you will pass superb shops selling fabulous breads, cakes, pies and tarts. Well, don't - it's really stupid to pass one of these superb shops without entering, especially early in the morning when everything is so aromatically exciting, still warm and very fresh. Buy a slice of tart. The recipe that I have included here is from Alsace. Down in the south of France they have another version. It is essentially the same but garnished with a slice of hard-boil