Susan's Homemade Flaxseed Bread

INGREDIENTS

• 2 1/2 cups warm water
• 1 teaspoon turbinado sugar
• 2 (1 ounce) packets rapid-rise yeast
• 3 cups whole-wheat flour, preferably organic
• 3 cups spelt flour, preferably organic
• 1 cup oat bran
• 1 cup ground flaxseed
• 1 cup walnuts
• 1 tablespoon coarse sea salt
• 3 tablespoons extra-virgin olive oil, plus more for bowl
• 1 tablespoon chopped fresh rosemary
• 2 tablespoons cornmeal