When dough is doubled, punch down and transfer to a lightly floured surface. Press into an 8-by-8-inch square, then tuck in sides slightly and roll up into a log. Transfer to a lightly greased 9-by-5-inch loaf pan, seam-side down. Cover with a tea towel and let rise 30 to 40 minutes until dough reaches the edges of the pan (but not doubled).
05Heat oven to 400ºF (375ºF if loaf pan is dark or nonstick). Sprinkle oats on top of risen loaf. Bake 40 to 50 minutes, rotating halfway through baking, until loaf is deep brown on top and sounds hollow when tapped on the bottom. Remove from loaf pan and transfer to a cooling rack to cool completely.