Slow-Cooked Pepper Steak

2 lbs. Beef round steak
2 tbsp. Oil
¼ cup soy sauce
1 cup chopped onion
1 clove garlic, minced
1 tsp. Sugar
½ tsp. Salt
¼ tsp. Pepper
¼ tsp. Ginger
4 tomatoes, cut into eights, or 1 (16 oz.) can tomatoes with liquid
2 large green peppers, cut into strips
½ cup cold water
1 tbsp. Cornstarch
cooked noodles or rice

Cut beef into 3 inch by 1 inch strips; brown in oil in a skillet. Transfer to a slow cooker. Combine the next seven ingredients; pour over beef. Cover and cook on low for 5-6 hours or until meat is tender. Add tomatoes and green peppers; cook on low for 1 hour longer. Combine the cold water and cornstarch to make a paste; stir into liquid in slow cooker and cook on high until thickened. Serve over noodles or rice.