Put potatoes and washed groats into a pot and cover with water 3 cm (about 1 inch) above potatoes and groats. Add salt and boil in medium heat about 1 hour until groats are soft.
Check time to time if the water is not evaporated and need additional water if needed. When groats are soft there should be 1 cm (1/3 of an inch) of water on top.
Add butter and make potatoes and groats into mash, add salt if needed.
Cut smoked meat 0.5cm x 1cm pieces (1/5 x 1/3 inches). Peal and cut onions. Pan fry onions, add smoked meat and fry until meat is golden. Add fresh parsley.