Preparation:
Step 1: Mix the preferment
In a small bowl, combine the flour, water and yeast. Mix by hand until completely combined, about 2 minutes. Cover and ferment for 12 hours at room temperature.
Step 2: Make the porridge
First, combine the rolled oats, salt and water in a small pot and mix with a wooden spoon until thoroughly combined. Cook on medium-low heat and stir often to prevent scorching. Bring the mixture up to a boil, then reduce to a simmer and cook until very thick (about 3–4 minutes). Once thick, pour it out into a tray or bowl and allow to cool to room temperature.
Step 3: mix the dough
In the bowl of your mixer, fitted with the roller and scraper (or KA dough hook), combine the preferment, porridge, and remaining Dinner Roll Dough ingredients. Mix on low speed until all are incorporated and homogenous (about 4 minutes). You may need to scrape down the sides of the bowl to ensure no dry pockets of flour remain. Once incorporated, turn the mixer up to medium-high and mix until a smooth, shiny dough forms and pulls away from the sides of the bowl (about 10–12 minutes).
Step 4: Bulk Ferment
Cover the dough and let rest at room temperature for 1 hour.
STep 5: portion and proof
Lightly flour your worksurface. Remove the dough from the bowl, and place on your floured surface. Portion the dough to 50g each; you should get 12 portions. Round each dough piece by hand, then place in the Challenger Bread Pan, lined with parchment and coated in pan spray. Cover with the lid of the pan and proof for 1–2 hours in a warm area or until doubled in size; the dough should be light and airy.
Step 6: Make WHipped honey-cinnamon butter
In the bowl of your stand mixer, fitted with the roller and scraper (or KA paddle), combine all of the ingredients for the butter. Mix on slow until they are homogenous, then turn the mixer up to high and whip for another 3–4 minutes until light and fluffy. Remove from the bowl and into a serving vessel.
Step 7: egg wash and bake
Combine the egg and egg yolk in a small bowl and blend well with an immersion blender or a whisk, whichever you prefer. Preheat an oven to 375°F (190°C). When the bread is ready to bake, brush the tops of the rolls with the egg wash. Bake for 30 minutes or until desired color is achieved. It should be deep golden brown and delicious.
Allow to cool slightly before serving with the whipped honey-cinnamon butter on the side.