Sour dough english muffins

fortified wheat flour 52.9% , water 23.5% , rice flour 11.8% , yeast 5.9% , cornmeal 2.9% , salt 0.5% , sugar 0.5% , Preservative 0.5% , wheat gluten 0.5% , soya oil 0.5% , wheat starch 0.3% , monoglycerides 0.2% , soya lecithin 0.1% , E260 0.0% , E330 0.0% , E516 0.0% , corn starch 0.0%