In a medium size bowl, combine 3 cups of the flour along with the other ingredients & mix with a wooden spoon until fully combined.
Place plastic wrap over the top of the dough. (touching the dough- not just covering the top of the bowl)
Set aside in a warm, dark place to rest at least 8 hours. (up to about 24 hours)
Remove dough from the bowl & place it on a well-floured surface & work into a ball. (if it's too wet or sticky you can work more flour in- but it should not be too firm)
Allow to rest approx 30 minutes.
Place cast iron dutch oven with an oven-safe lid in the oven & preheat the oven to 450 degrees.
Carefully remove the pot once the oven has preheated & spray the bottom of the pot with cooking spray or an oil mister. You can also place the dough on a piece of parchment paper and place that into the pot instead.
Place dough in pot, slash the top several times.
Cover & bake 30 minutes.
Remove lid & bake an additional 10-15 minutes or until golden & brown. (you know it's done if it sounds hollow when tapped with your fingernail)
Cool slightly before serving.