Steak Frites with 10-minute Béarnaise Sauce Recipe

So I used the sous vide to cook the flank steaks (129F for 3 hours) and then seared it on a hot cast iron skillet for 1.5min per side. I also made the béarnaise sauce. If I made this again, I would cut the time I sous vide the steaks and I’m not sure if I would make the sauce again. It honestly just reminded me of a runny mayonnaise