Add all ingredients to a large bowl and mix until blended. Cover and let rest 20 minutes so the oats can absorb some of the liquid. After 20 minutes, knead for 10 minutes by hand until the dough is smooth and elastic. (You can use a bread machine but I don't have one)
Place the dough in a lightly greased bowl until it has notably risen (1 to 1-1/2 hours). It may not double in size.
Gently deflate the dough and form into a log shape. Place the dough into a greased pain de mie (Pullman) pan. Cover with greased plastic wrap and let it rise again until it is 1" from the top, 60 to 90 minutes.
Preheat the oven to 350 °F °F toward the end of the rise time. Remove the plastic wrap and slide the pan's lid closed. Bake for 35 minutes.
Remove the lid and bake for an additional 5 to 10 minutes. Bread is done when golden brown and registers 190 °F when inserted with an instant-read thermometer.
Remove the bread from the pan onto a rack and run a stick of cold butter over the top for a soft buttery crust. (optional)
Cool completely before cutting. Store in an airtight container at room temperature for several days.
Notes
This recipe can be made in a 9x5 loaf pan. Cut all ingredients, except yeast, in half. Or, use 2 smaller loaf pans.
This recipe was calculated using the exact brands and measurements I used to make this recipe. If you are following a strict diet please note changing anything will cause the nutritional info to change. My calculations are intended as a guide only.