This is an easy, traditional, and delicious potato kugel (potato pudding) recipe from the Jewish cookbook, "Passover by Design: Picture Perfect Kosher by Design Recipes for the Holiday", by Susie Fishbein.
Place the oil into a large 9- by 13-inch rectangular baking pan; set aside.
Fill a large bowl with cold water and add some ice cubes. Peel the potatoes and place them into the bowl of cold water. This will prevent them from turning brown.
Finely chop the onions in the container of a food processor fitted with a metal blade. Remove them to a large bowl. Cut the potatoes into chunks and place them into the food processor; process until almost smooth. Add the potatoes to the onions.
Add the salt, pepper, and sugar to the potato mixture. Add the eggs and stir until thoroughly combined.
Place the baking pan with the oil into the oven. When the oil sizzles, carefully remove from oven and spoon some of it into the potato mixture. This will help make the kugel fluffy. Mix well. Pour the potatoes into the oiled pan. Bake, uncovered, for 1 hour.