Add the steak, green bell pepper, red bell pepper, and onion to the crock pot.
Sprinkle the ground ginger, garlic powder, and black pepper over the beef and vegetables. Add the soy sauce, brown sugar, and beef broth. Stir gently to combine.
Cover and cook on Low for 5–6 hours or High for 2½–3 hours, until the steak is tender.
About 30 minutes before serving, whisk together the cornstarch and cold water in a small bowl until smooth.
Stir the cornstarch slurry into the crock pot. Cover and cook on High for 30–60 minutes, or until the sauce has thickened to your desired consistency.
Serve warm over white rice and enjoy!
Video
Notes
The peppers are soft in this recipe. If you prefer firm peppers, do not add them in at the beginning of the cook time and stir them in for the last 1 hour of the cooking time if cooking on low or 30 minutes if cooking on high.