Ingredients:
1 pkg. yeast
1/2 cup sugar (plus 1/2 tsp additional to proof the yeast)
1/2 cup warm water
1 cup warm milk
1 1/2 sticks ( 3/4 cup butter softened)
2 tsp. salt
2 eggs
1 cup mashed Japanese "Satsuma-imo" sweet potatoes (make link to my potato recipe) run through a food mill to eliminate any chunks that may remain after the potatoes have been mashed #1.
4 cups bread flour (with more as needed)
Directions:
Day1:
1. Proof the yeast in the warm water and 1/2 tsp. sugar. Warm the milk with the butter in it. Dissolve the sugar in the milk mixture.
2. Using a mixing paddle on the stand mixer add the warm milk butter mixture, eggs and mashed potatoes blend thoroughly. Add the proofed yeast and salt. Mix completely.
3. Switch to a dough hook and add the flour one cup at a time until the dough clings to the hook and is smooth and springy to the touch. Knead on speed 2 for 7 to 10 minutes.
4. Form into a ball and put into a bowl with a small amount of vegetable oil turning the dough to cover with a coat of the oil. Cover tightly and place in the refrigerator overnight (or as the recipe says up to 16 to 18 hours).
Day2:
1. Next morning punch down the dough. (It will extremely cold and dense so "punch down" may not be the process that is actually possible. Just flatten the best you can) #2. Let rest for about 5 minutes (picture below) #3. Cut off pieces weighing 2 1/4 oz. #4. Form into rolls and place in a heavily greased baking dish several inches apart so they can rise #5. Cover and let rise until doubled. Cook in a 400 degree oven for 18 to 20 minutes until they sound hollow when tapped #6.