Mix flour, starter, and milk and ferment for at least 8 hours in the fridge
After the bulk ferment, add in all remaining ingredients except blueberries and mix until just combined
Gently fold in blueberries
Pour a generous amount of batter into muffin tin (mine makes 12 muffins)
Fold in blueberries
Bake at 425 ° for 25 minutes or until golden brown