Tourtelettes au levain : Dissolve a teaspoonful of brewer's yeast in a little warm cream, mix ½lb. of butter with a pinch of salt, six eggs, and a tumblerful of cream; into this work some flour, then add the yeast, and knead in more flour until the paste is of a sufficient consistency to break into small lumps; let it stand a little while only to rise; butter some small moulds, fill them with the paste nearly up to the edge, brush them over with egg, and bake them in a hot oven.