1 Preheat the oven to 375 degrees. Boil the potatoes until tender in a saucepan, then drain thoroughly and mash in a bowl, while still hot, with a potato masher.2 Meanwhile, heat the oil in a skillet. In a food processor,coarsely grind the onions, and add to the skillet. Fry on a medium flame, stirring occasionally so they don’t scorch, until dark. 3 This step will take about 20 minutes. Transfer the onions, oil and all, to the mixing bowl containing the mashed potatoes, and add all remaining ingredients. Pour the batter into a greased 9×13 inch baking pan.4 Brush the top with the beaten egg, and sprinkle with sesame seeds. Bake one hour, or a little longer, until the top is firm and golden. Delicious hot or cold.
