Prepare a dough as for Vella Kozhakattai, and set aside. Roast sesame seeds till pink. Grind to a fine powder along with jaggery. Add ghee and mix well. Now take a small portion of dough and with greased palms, pat into a disc. Put a small portion of filling in the centre. Fold over the edges and make a half circle. Press the edges well. Similarly make all Kozhakattais and steam.