In medium bowl, add flour, oats, and salt; mix well, and set aside.
In a stand mixer bowl, add warm water and yeast. Let rest 5 minutes. Add shortening, egg and molasses. Whisk to combine. Add 1/2 of the flour mixture; beat 2 minutes on medium speed using the paddle attachment. Beat 2 minutes on medium speed. Add the rest of the flour mixture and beat again until smooth, about 1 to 1 1/2 minutes. (NOTE: For hand mixing: following above steps, mix ingredients in large mixing bowl using a wooden spoon or dough whisk.)
Scrape down batter from sides of bowl. Place dough in lightly oiled bowl and turn to grease top. Cover; let rise in warm place until doubled, about 30 to 40 minutes.
Grease one 5x9-inch OR 4½x8½-inch loaf pan.
Beat down raised batter in about 25 strokes. This is a thick, somewhat sticky batter; spread evenly in the pan. Tap pan on table to settle the batter. Let rise only until edges of batter come to within 1-inch of top of large pan or reach top of smaller pan, about 30 minutes.
Preheat oven to 375°F.
Bake 40 to 50 minutes or until well browned on sides and top. Remove from pans and cool on racks. Brush with butter.