This paleo version of Beef Stroganoff tastes so good that my mother did not realize this was not her normal recipe! I paired this with some cooked broccoli and cauliflower and it was delicious. It would also be great with cauliflower rice, sweet potato noodles or squash.
Turn electric frying pan onto 250F.
Add butter, ground mustard, sea salt and beef to pan and brown beef by cooking for 1-2 minutes per side.
Once beef is browned, add onions, garlic, mushrooms and dijon mustard and cook for a few minutes (until onions start to turn clear).
Add remaining ingredients and simmer for another 20-30 minutes until the sauce achieves the thickness you like.
Make sure to slice your steak against the grain for the most tender meat.