My mother used to used left over mashed potatoes to make these potato pancakes the next night for supper. She fried hers and they were quite delicious. However, baking is less messy.
- Preheat oven to 375°F.
- In large skillet, melt the butter, then add the onion and cook over moderate heat for 3 minutes, stirring.
- Remove from heat.
- In a large mixing bowl, whisk three of the eggs till well blended, then add the cooked onions, potatoes, flour, salt, pepper, Tabasco and stir until mixture is firm.
- Form the mixture into 16 round pancakes and place on a large greased baking sheet.
- In a small bowl, whisk the remaining egg with the water, brush the top of each pancake with the egg wash, and bake the pancakes till golden brown, 20-25 minutes.