Steps
1. To prepare sweet potato flour, wash, peel, shred and sun dry sweet potatoes. Then pound and sieve.
2. Sieve flour into a bowl.
3. Add grated orange rind to flavour.
4. Rub fat into flour until the mixture looks like fine breadcrumbs or gari.
5. Add sugar and mix.
6. Beat up egg and add to mixture.
7. Add juice and mix to a stiff consistency that would leave the bowl clean.
8. Roll out pastry on a floured pastry board, to about 1/2 cm thick.
9. Cut into fancy shapes and prick with a fork.
10. Put onto a greased baking tray, glaze with water and sugar and bake.
11. Serve on a cake plate.

Source
Food and Agriculture Organization of the United Nations (1990), Roots, tubers, plantains and bananas in human nutrition, ISBN 92-5-102862, Rome