Cook the potatoes in boiling water for 10 – 15 minutes until tender. Drain well and mash with the butter, milk and a little seasoning.
Meanwhile fry the sausages for around 8 minutes, or until cooked through. Cover each sausage in a coat of mashed potato. Roll in egg and then in breadcrumbs.
Heat 5 cm (2 inches) of vegetable oil in a frying pan and cook the bombs, three at a time for 5 minutes or until crisp and golden. Drain on kitchen paper and serve with baked beans.