In a crockpot, place the sliced flank steak at the bottom.
In a separate bowl, whisk together the beef broth, soy sauce, brown sugar, minced garlic, minced ginger, and sesame oil.
Pour the sauce mixture over the beef in the crockpot, ensuring the meat is well coated.
Cover the crockpot and cook on low for about 6-7 hours or on high for 3-4 hours until the beef is tender.
With 30 minutes left in cooking, mix 1 tablespoon of cornstarch with 2 tablespoons of water to create a slurry. Stir this slurry into the crockpot to thicken the sauce.
Add broccoli florets to the crockpot during the last 15 minutes of cooking. Stir gently to combine, then cover to allow the broccoli to steam and become tender.
Once cooked, serve the beef and broccoli over cooked rice or noodles and sprinkle with sesame seeds for garnish.
Notes
Serve in deep bowls for a comforting feel. Drizzle a little extra sesame oil on top and garnish with chopped green onions for vibrant color. Enjoy!