Ingredients
Method
- Gather all ingredients.
- Sprinkle beef sirloin strips with garlic powder. Heat vegetable oil in a large skillet over medium heat, and sear beef strips until browned, about 5 minutes per side. Transfer to a slow cooker.

- Dissolve bouillon cube in hot water in a small bowl, then whisk in cornstarch until smooth.

- Pour into the slow cooker with beef strips. Stir in onion, green peppers, stewed tomatoes, soy sauce, sugar, and salt.

- Cover and cook on High for 3 to 4 hours, or on Low for 6 to 8 hours.

