Heat a medium skillet over medium high heat. Add oil and meat to the pan and brown the meat, breaking it up with the back of a wooden spoon as it cooks. Add chicken stock to the meat. Season the meat with paprika, Worcestershire, salt and pepper. When the liquid comes to a bubble, reduce heat to simmer. Cook meat 15 minutes, stirring occasionally.
Pile meat into buns or rolls and top with raw finely chopped onions.
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