1.Boil, peel and mash potatoes and add salt and black pepper.
2.Heat oil in a pan and stir fry the vegetables. Add seasonings.
3.Mix the stir-fried vegetables and mashed potatoes, make kebabs of the mixture.
4.Dip the kebabs in beaten egg and deep fry until brown.
5.Take a slice of bread, place kebab, onion rings and cucumber pieces and top with the other slice.
6.Cut the sandwiches diagonally.
7.Serve with French Fries and ketchup.