In a bowl, mix together flour, brown sugar, oats, salt and baking soda. Make
a well in the center.
Blend egg, milk and oil together; stir in starter. Pour this mixture all at once
into the flour well. Stir just to moisten ingredients, with about 12 to 15 full
circular strokes that scrape the bottom of the bowl; batter will be a little lumpy.
Grease muffin cups or use paper liners. Fill about 2/3 full.