Place roast in slow cooker. Whisk together remaining ingredients and pour over roast. Cook on LOW for 8-12 hours or on HIGH for about 4½hours.
In large skillet, evenly coat rice with olive oil. Add 1 cup of heated chicken broth, stirring continually.
Maintain a slow boil and add rest of broth, 1 cup at a time, while stirring continually. When all the broth is absorbed, add cheese, onion powder and pepper.
