In the bowl of a standing mixer, combine yeast and warm water. Stir until grains dissolve. Let the yeast proof for 10 to 15 minutes until foamy.
In a separate mixing bowl, whisk flour, oats, salt, and cinnamon.
Set the mixer to low and use a dough hook to slowly add the dry ingredients to the yeast mixture. Gradually add the maple syrup, melted butter, and egg.
Continue mixing on low until dough pulls away from and cleans the sides of the bowl. The dough should feel smooth, elastic, and slightly tacky. If too sticky, add more flour one tablespoon at a time. If too dry, add water a tablespoon at a time until desired consistency is reached.
Place dough in lightly greased container. let rise until doubled and puffy, about 1 hour.
In a small mixing bowl, combine the cinnamon sugar to create a filling. Set aside.
Punch down dough, and turn out onto a lightly greased surface. Shape dough into a rectangle. Brush with melted butter and sprinkle with cinnamon sugar and raisins.
Roll dough and place in a lightly greased 9-inch by 5-inch bread pan. Cover and let rise until dough reaches above the lip of the pan, about 30 to 45 minutes. Dough will spring back slowly if poked.
In a small container, beat together the egg with the water to create an egg wash. Brush over the top of the dough, and sprinkle with additional oats.
Preheat oven to 375° Fahrenheit (190° Celsius) and bake for 35 to 40 minutes.
Turn out bread onto a wire cooling rack and allow it to cool completely before slicing and serving.