It's dinner time!

Ingredients

• 2 cups steel-cut oats
• 5 cups bread flour
• 4 cups whole wheat flour
• ¾ cup nonfat dry milk powder
• 6 tablespoons coconut sugar
• 3 tablespoons vital wheat gluten
• 2 tablespoons kosher salt
• 2 tablespoons flax seeds, crushed
• ¾ teaspoon active dry yeast
• 5 cups water
• 6 tablespoons vegetable oil
• 3 tablespoons raw apple cider vinegar (such as Bragg®)
• 2 tablespoons all-purpose flour, or as needed
• 1 egg
• 1 tablespoon water, or as needed