Step 1

Mix the balsamic vinegar, oil, honey, worcestershire, dijon mustard, garlic, salt, and pepper in a small bowl

Step 2

Place the flank steak and marinade ingredients in the slow cooker and flip the steak once or twice to coat the steak.

Step 3

Cook undisturbed for 6 hours on low or 3-4 hours on high until very tender.

Step 4

When the cooking time is done, carefully transfer the steak to a cutting board, slicing it against the grain and serving as desired.