01 -
Arrange beef slices flat on a work surface. If needed, gently pound each piece with a meat mallet for uniform thickness.
02 -
Evenly spread each beef slice with one tablespoon of mustard. Arrange a slice of bacon, portions of onion, and pickle slices over the mustard.
03 -
Roll up each beef slice tightly, tucking in the sides, and secure with toothpicks or kitchen twine to hold the filling inside.
04 -
Heat olive oil in a Dutch oven over medium-high heat. Sear each roll on all sides for 5–7 minutes until deeply browned. Remove and set aside.
05 -
Melt butter in the same pot, then whisk in flour to form a roux. Gradually pour in beef broth and, if using, red wine, whisking constantly and scraping up browned bits. Simmer until sauce begins to thicken.
06 -
Return the browned rouladen to the pot. Cover and cook over low heat for approximately 90 minutes, allowing meat to become tender and flavors to develop.
07 -
Carefully remove rouladen, discard toothpicks or twine. Serve hot, sliced if desired, with the gravy spooned over and a sprinkle of chopped parsley.