Combine the yeast, water and 50g of white flour. Let this sit and bubble for about 30min.
In a mixer, or by hand, combine the remaining ingredients except for the cornmeal. Mix and knead for about 10min. It should be a soft dough. Cover this, and let it rise for about 2 hours.
After 2 hours, take the dough and divide into about 8 pieces. Shape these into balls, roll in the cornmeal and then lightly squish to form a patty. Remember these will be cooked, so they should be a bit thin (about 2cm thick). Let these rest for 30min.
Using a heavy bottom pan (I used my cast iron pan), slowly heat up. Place the muffins on the pan and cook for about 7-8min per side. When fully cooked, place a wire rack and let cool. Then, enjoy!