5. Add Wine
Deglaze the pan by adding the wine, broth and cognac. Make sure to scrape all of the bits from the pan at this time. These bits add flavor to the sauce. Add the butter and tomato paste, stir until combined. Salt and pepper this broth to taste at this time. Let the broth cook for five minutes on medium heat. Add the beef and bacon to the broth/soup. Place the stew, pearl onions, thyme and bay leaves in a vacuum seal bag ensuring the bag is welled sealed as you would for traditional Sou vide cooking.