In a bowl, mix together all the ingredients, except roasted peanut powder and form a dough. Divide the dough into 8 equal sized balls. Flatten the balls to form tikkis (patties). Coat with roasted peanut powder. Dry roast on a cast iron tawa (griddle) until the peanut powder browns. Enjoy with chickpea curry or green chutney and date-tamarind chutney.