Start in the morning or evening. In a glass or ceramic bowl, mix all the ingredients into a uniform dough. It will be somewhat wet, sticky, and shaggy. Cover with plastic and let stand throughout the day or overnight.
After 10 hours (can be more but not less), scrape the dough off the sides of the bowl and with floured hands form into a dough by stretching the top side and roughly folding the dough underneath. Place back into bowl and set aside.
Pre-heat oven to 450˚ F.
For the swirl, in a small bowl, whisk your sugar and the cinnamon together. In a small saucepan, mix half of the cinnamon sugar with your melted butter.
Wet the surface and stretch the dough to form a flat rectangle. Then sprinkle and spread your cinnamon sugar, leaving a 1-inch border round the edged. Roll your dough into a log and place the loaf, seam-side down, into the prepared loaf pan. Bake for 25 minutes.
After 25 minutes of baking, remove the lid and bake for another 25 minutes or until the crust is golden brown
Carefully remove the bread from the loaf tin and place to cool on a wire rack Wait at least 1 hour before cutting for best results.