PLACE meat, mushrooms, onions and garlic in slow cooker. Add broth, paprika and salt. Cover with lid.
COOK on LOW for 7 to 8 hours (or on HIGH for 5 hours).
MIX sour cream, flour and mustard. Add to meat mixture in slow cooker; stir until well blended. Cover and cook on LOW for 15 min. Meanwhile, cook noodles as directed on package. Drain noodles; place in serving bowl. Add meat mixture; mix lightly. Sprinkle with the parsley.