Scrub potatoes and boil in skins until tender. Drain, peel and mash while still warm. Allow to cool. Dissolve yeast in 1/2 cup of the warm water, mix well with 3 tablespoons of flour in a large bowl and let this "starter" rise for 30 minutes. Add remaining 2 cups warm water, salt and caraway, then add remainder of flour and potatoes and mix well. Turn onto floured board and knead about 12 to 15 minutes. Shape into ball. Oil bowl, put dough in it, turn to coat. Rise till double 1 to 2 hours.
Remove dough, punch down, knead 4 to 5 minutes. Shape into large round loaf, place in buttered 12' ovenproof skillet with rounded sides and let rise 30 to 35 minutes. Brush loaf with water, then make deep incision in form of cross in center. Bake in preheated 400 degree oven 1 hour, or until brown and hollow sounding.
Notes: Very delicious and rises well.
