My Aunt's Homemade Tea Rolls

1 cake yeast
1/2 cup warm water
2/3 cup shortening
3/4 cup sugar
1 cup mashed potatoes
2 eggs well beaten
1 tsp. salt
1 cup milk, scalded
7-8 cups flour

Dissolve yeast and salt in water. Scald the milk and melt the shortening in the milk with sugar. Cool. Add the potatoes and milk to yeast mixture. Add flour for sticky dough. Refrigerate overnight. Make into rolls (I do 2, 3 or 4 to a muffin tin), put in greased muffin tin. Let rise and bake 10 minutes at 425-450.