reduce the heat to low. Let simmer for about 1.5 to 2 hours, or until the beef is tender, adding more broth or water if needed to prevent it from drying out.
Once the beef is cooked, remove it from the skillet and keep warm.
In a small bowl, mix the flour with a bit of water to form a smooth paste (slurry).
Stir the flour paste into the gravy in the skillet, and cook over medium heat until the gravy thickens, stirring constantly.
Once the gravy has thickened, remove the toothpicks from the beef rolls.
Serve the beef rouladen with the gravy spooned over the top, garnished with chopped parsley if desired.
Enjoy your delicious German Beef Rouladen with your favorite sides!
