Add flour and beef to a large resealable plastic bag (e.g. Ziploc) and shake to combine until flour equally coats beef.
Put beef in slow cooker
In a medium bowl, whisk together soy sauce, ginger, honey/maple syrup, vinegar, garlic and oil.
Pour over beef.
Cover and cook on high for 3.5 hours.
Once done turn slow cooker off and let rest for 30 minutes.
Serve immediately with rice (or quinoa) and top with carrots, cabbage, cucumbers and green onions.
Top with additional sauce and sesame seeds if desired.