In a large skillet, brown beef, pork and onions in oil over medium heat; drain. Add the water, paprika, salt and marjoram; bring to a boil. Reduce heat; cover and simmer for 1-1/2 hours or until meat is tender.
Just before serving, combine flour and sour cream until smooth; stir into meat mixture. Bring to a boil over medium heat; cook and stir for 1-2 minutes or until thickened and bubbly. Serve over noodles.