2 cups lukewarm water
1 cup buttermilk
1 ½ Tablespoons active dry yeast
1 Tablespoon Kosher salt
1 ½ Tablespoons sugar
6 cups unbleached all-purpose flour
1 Tablespoon melted unsalted butter
At this point, you can use the dough immediately or keep it covered (not airtight) in the refrigerator to use over the next 7 days. Sprinkle the dough with a little flour and scoop out half. Dust the piece of dough with a little more flour and quickly and gently shape it into a ball. Stretch the ball into an oval and place in a greased 9x4x3 non-stick loaf pan. The pan should be a little more than half full.