Course: Main Course
Cuisine: Asian
Keyword: crockpot beef, easy slow cooker recipe, sesame beef, slow cooker beef
*I had never purchased oyster sauce before making this, but I found it on the Asian aisle at my local grocery store, right by the teriyaki sauces. It was only about $2 and has such an amazing taste that totally makes this dish! I don't know what else you could use as a substitute . . . I highly recommend just trying it.