Melt butter Fry bacon till crisp and crumble. Set aside. To sourdough starter add lukewarm milk, sugar and salt. Beat well. Add slightly beaten egg, melted butter and grated cheese. Add baking soda to flour. Stir in flour 1 cup at a time, stirring after each addition. Reserve at least 1/2 cup of flour to add during kneading process. Turn out onto floured surface and knead until dough is smooth and elastic. Shape into loaves and place in greased loaf pans. Brush with melted butter. Cover with a cloth. Set in warm place free from drafts and let rise for about 2 hours or until doubled in size. Bake at 375 for 30 minutes. If bread begins to brown too soon, cover with a tent of aluminum foil. Makes two loaves.