Combine the sourdough starter, water, and plant milk. Stir until starter is dissolved.
Add the rest of the ingredients and mix until a shaggy dough forms.
Autolyse: Cover the bowl and allow the shaggy dough to rest for 30 minutes at room temperature. This will allow the gluten to start forming and make the dough more workable.
Knead the dough until it comes together and forms a workable ball. If the dough is too dry or hard, add small amounts of water.
Place the dough ball in a large, lightly greased (I use coconut oil to grease, but any plant oil will do) bowl. Cover in a relatively airtight manner. I will sometimes layer two plastic shopping bags over the top and secure with a rubber band, and have also found that a heavy pot lid without vents works well with one of my bowls. If you use plastic wrap, that works.
Allow the dough to rest until it grows 50% to 100% - ie, until it gets half way to doubling or more. I rested it for 12 hours overnight. You can also put it in the oven with the oven light on to gently increase the warmth, which will cause it to rise more. This step will take anywhere from 3 to 12 hours depending on your starter, air temperature, and schedule.
Preheat the oven to 350 degrees F
Place the dough on a lightly greased surface and knead a few times into a ball.
Divide the dough into 12 equal portions, covering the portions you are not working with a damp dish towel while they wait.