Follow these simple steps to create your Slow Cooker Broccoli Beef:

1. Prepare the Beef: Slice the flank steak thinly against the grain to ensure tenderness.
2. Mix Sauce: In a bowl, combine beef broth, soy sauce, brown sugar, minced garlic, minced ginger, and black pepper. Stir until well mixed.
3. Brown the Beef: In a skillet, heat vegetable oil over medium-high heat. Brown the sliced beef on both sides for about 2-3 minutes. This step enhances the flavor.
4. Add to Slow Cooker: Place the browned beef into the slow cooker. Pour the sauce mixture over the beef.
5. Cook: Cover and cook on low for 4-6 hours or on high for 2-3 hours until the beef is tender.
6. Add Broccoli: In the last 30 minutes of cooking, add the broccoli florets to the slow cooker. Stir gently to combine.
7. Thicken the Sauce: In a small bowl, mix cornstarch with a few tablespoons of the sauce from the slow cooker. Stir until smooth, then return to the slow cooker. This will thicken the sauce.
8. Finish Cooking: Let it cook for an additional 10-15 minutes until the sauce has thickened and the broccoli is tender.
9. Serve: Once cooked, serve the Slow Cooker Broccoli Beef over rice for a complete meal.

These steps will guide you in creating this incredible dish effortlessly.