Favorite Sauerkraut

1 onion, diced
2 tablespoons butter
1 quart sauerkraut
1 raw potato, grated
1 tablespoon brown sugar

Fry onion in butter. Add sauerkraut and cook for 5 minutes. Add potato. Cover with boiling water and cook for 30 minutes over low heat. Add brown sugar and simmer 30 minutes longer.