1. In a small bowl, whisk together the warm water and milk and sprinkle the yeast on top. Set aside.
2. Using an electric mixer, mix together the flour blend, oats, flaxseed meal, xanthan gum, salt, and baking soda.
With the mixer running on low speed, add the molasses, melted butter, vinegar, egg yolks, and yeast mixture. Increase the mixer to high and beat for 1 to 2 minutes, until incorporated.
3. In a separate bowl with clean beaters, beat the egg whites until soft peaks form - the beaten whites should look similar to whipped cream.
Fold the egg whites into the batter and cover with plastic wrap. Allow the dough to rise in a warm area for 1 hour.
4. Beat the mixture on high for 2 minutes. Pour the batter evenly into a greased loaf pan, cover loosely with plastic wrap and allow to rise for 1 to 1 1/2 hours, until the bater is slightly above the pan.
5. Preheat the oven to 375F (191C) and bake the bread for 20 minutes. Cover the pan with aluminum foil and bake for another 20 to 25 minutes. Remove the bread from the baking pan and allow to cool on a rack.