Bake Play Smile
Slice the steak into thin strips and season to your liking with salt and pepper. Sear the beef 30 seconds each side. Transfer the beef strips to the slow cooker, and repeat with the remaining beef strips. Place the second batch in the slow cooker after searing too.
Heat the butter in the frying pan and saute the chopped onions until soft. Add the sauteed onions to the beef strips in the slow cooker.
In a jug or bowl, mix together the beef stock liquid, dijon mustard, Worcestershire sauce, sweet paprika, dried thyme and tomato paste.
Pour the liquid into the slow cooker and stir through the beef strips and onion. Cook for 8 hours on low or 5 hours on high.
With one hour of cooking time remaining, add the sliced mushrooms and stir through.
With 30 minutes cooking time remaining, stir through the sour cream. Let it simmer away for the remaining time.
Serve over pasta and enjoy!