Combine the oats and 1 cup (240 g) water in a small saucepan. Cook over medium heat for 3 to 5 minutes until thick and creamy. Let cool completely to room temperature; this should yield about 1 cup (250 g) cooked oatmeal.
½ cup (50 g) old-fashioned oats, 1 cup (240 ml) water
In a stand mixer, combine the flour, yeast, salt, honey, oil, 1 cup (240 g) room temperature water, and the cooled oatmeal. Mix on low speed for 2 to 3 minutes, then knead on medium speed for 6 to 8 minutes until smooth and elastic.
5½ cups (715 g) all-purpose flour, 2¼ tsps (7 g or one packet) RapidRise yeast, 2 tsps (12 g) table salt, ¼ cup (80 g) honey, ¼ cup (60 ml) canola oil , 1 cup (240 ml) lukewarm water
For hand mixing, stir the ingredients together in a large bowl until a rough dough forms. Transfer to a lightly floured surface and knead for 8 to 10 minutes until smooth and tacky. If the dough is too wet, add flour 1 tablespoon (8 g) at a time. If it is too dry, add water 1 tablespoon (15 g) at a time.
Shape the dough into a smooth ball and place it in a clean, lightly oiled bowl. Cover with a damp towel or plastic wrap and let rise in a warm spot until doubled in size, about 1 to 1½ hours.
Deflate the dough and divide it into two equal pieces. On a lightly floured surface, flatten each piece into a rectangle about 8 inches (20 cm) wide. Roll tightly from the short side into a log and place seam side down in greased 8x4-inch (20x10 cm) loaf pans.
Cover loosely with a damp towel or lightly oiled plastic wrap and let rise until the dough is about 1 inch (2.5 cm) above the pan edges, 30 to 45 minutes.
Preheat the oven to 375°F (190°C). Whisk the egg and 1 tablespoon (15 g) water for the egg wash. Brush the loaves and sprinkle oats on top. Bake for 30 to 35 minutes, until golden brown and hollow when tapped. The internal temperature should reach 190°F (88°C).
1 large egg, 1 tbsp (15 ml) water, Additional old-fashioned oats
Remove the loaves from the pans and cool on a wire rack for at least 1 hour before slicing.