1Proof yeast and 1/2 cup warm water in a large mixing bowl.
2Combine hot milk, sugar, butter, salt, and 1/2 cup water in a medium bowl. Cool to 110 degrees.
3In small bowl, slightly beat 5 eggs, then add to cooled milk mixture. Add milk mixture to yeast mixture. Add 2 cups flour and beat until smooth. Slowly add remaining flour until it forms a stiff dough. Knead on a floured board for 10 minutes (5 minutes with a bread hook). Place in a large glass or plastic bowl lightly greased. Turn dough over to grease both sides. Cover and let rise in a warm, dark place until doubled in volume, approximately 60 minutes.
4Punch down, cover, and let rise again until double, approximately 30 minutes.
5Punch again, and form into three parts. Form each part into a 20-inch roll. Braid rolls on a large, greased cookie sheet. Cover and let rise until doubled.
6Lightly beat remaining egg and brush loaf. Sprinkle with sesame seeds. Bake in preheated 350 degree F (175 degrees C) oven for about 55 minutes until nicely browned. May be made into two regular sized loaves. Reduce baking time slightly.