In a large bowl pour boiling water over oats, whole wheat flour, brown sugar, salt, and butter, and Nutella. Stir until combined. Let cool to lukewarm.
While batter is cooling combine yeast with warm water and let sit for 5 minutes. Combine with batter.
Stir in flour 1/2 cup at a time until the dough is stiff enough to turn out to a floured work surface. Continue to knead in remaining flour for 5-10 minutes.
Place in a greased bowl and let rise 1 hour until doubled.
Punch dough down and let rise again (about 30 minutes).
Preheat oven to 350. Shape into 2 loaves and place in greased loaf pans.
Prepare glaze. Slice loaves and pour glaze over top. Garnish with more oats if desired.
Bake at 350 for 30-40 minutes.