Slow Cooker Pepper Steak

Spray slow cooker with non-stick cooking spray. Place beef on bottom of crock pot and sprinkle with garlic powder. Mix bouillon cube with hot water until dissolved, then mix in cornstarch until dissolved. Pour into the slow cooker with meat. Stir in onion, 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. For the last 30 minutes of cooking, add the sliced peppers and turn heat up to high (if it wasn't on high already). If you add the peppers any sooner, they become pretty mushy. I also added a tablespoon of cornstarch (mixed with 1 Tablespoon cool water) just before serving to the drippings left in the slow cooker, which made a yummy gravy that was perfect over rice.