
In a small microwavable bowl add the water and the beef bouillon cubes. Place in the microwave for 60 seconds, mix until dissolved. Add to the slow cooker.
Add the soy sauce, ginger, garlic powder, pepper, brown sugar and cornstarch. Whisk until smooth.
Add the beef, bell peppers and onions into the sauce in the slow cooker.
Cover and cook on LOW for 5 hours. Serve over steamed rice, spaghetti noodles, steamed veggies or quinoa.