In a small bowl add the beef broth, soy sauce, bouillon, Worcestershire, brown sugar, ginger, salt, pepper, and cornstarch and whisk until combined.
Cut the beef into thin slices against the grain for the most tender texture., and the peppers and onions into large chunks, and place into the slow cooker.
Add the minced garlic along with the sauce.
Cook on low for 6-7 hours or high for 3-4.
Serve over white rice or pasta and enjoy!
Notes
Make sure your bell peppers are cut into large chunks to hold up to the cooking time in the slow cooker.This recipe freezes well. Let it cool completely before storing in a freezer-safe container for up to 3 months.