Directions

Add starter, milk, sugar, egg and ube in a bowl. Stir. Add bread flour and salt. Knead til soft and shiny. Add butter by the tablespoon til incorporated.

Pour into greased container. Let rise for 4 hours at room temp. Place in fridge overnight.

Roll into a large rectangle. Jelly roll the long end. Cut into 16 pieces. Roll in panko. Let rise for 2 hours. Sprinkle more panko on top right before baking.

Bake at 425 for 5 minutes, then turn down heat to 350. Bake for additional 10 minutes.