Creating Slow Cooker Broccoli Beef is easy if you follow these simple steps:

1. Prepare the Beef: Slice the flank steak against the grain into thin strips. This ensures tenderness.
2. Mix the Sauce: In a bowl, combine soy sauce, brown sugar, minced garlic, minced ginger, sesame oil, and red pepper flakes (if using). Stir until the sugar dissolves.
3. Place in Slow Cooker: Add the sliced beef to the slow cooker. Pour the sauce mixture over the beef, ensuring all pieces are coated.
4. Cook: Cover and cook on low for 4 to 5 hours or on high for 2 to 3 hours until the beef is tender.
5. Add Broccoli: About 30 minutes before serving, add the broccoli florets to the slow cooker. Stir gently to coat them in the sauce.
6. Thicken the Sauce: In a small bowl, mix cornstarch with water to create a slurry. Stir this mixture into the slow cooker 10 minutes before serving to thicken the sauce.
7. Serve: Once the broccoli is tender and the sauce has thickened, serve the Slow Cooker Broccoli Beef over cooked rice or noodles.

By following these steps, you’ll have a delicious and satisfying meal that’s practically effortless!