chopped red onion
Saute the red onions on medium high heat with a bit of oil for about 5 minutes.
Add the butter, beef broth and salt. Whisk everything together well. Then heat the au jus on high heat, reducing the sauce for about 5 minutes.
Once the sauce is done reducing. Strain the onion out from the au jus. Or if you like the onion flavor, keep them in!
Serve with a rib roast, french dip sandwich or roasted chicken!
Easy and delicious in just 10 minutes!