These small tartlets filled with leek and cumin are ideal served warm with drinks. Alternatively they could be made as larger tarts and served as a first course.
To make the filling, melt the butter in a saucepan over low heat. Add the leek, bay leaf, thyme and salt. Cover and cook slowly for 5 minutes, then uncover and continue cooking for about 5-10 minutes, or until the mixture is dry. Remove the bay leaf. Add the cumin, mix well and set aside to cool.