Multi-Grain Waffles

1.Mix buttermilk and oats in a medium bowl; let stand for 15 minutes.
2.Whisk whole-wheat flour, flour, wheat germ, baking powder, baking soda, salt and cinnamon in a large bowl.
3.Stir eggs, sugar, oil and vanilla into the oat mixture. Add the wet ingredients to the dry ingredients; mix with a rubber spatula just until moistened.
4.Coat a waffle iron with cooking spray and preheat. Spoon in enough batter to cover three-fourths of the surface. Cook until waffles are crisp and golden brown, 4 to 5 minutes. Repeat with remaining batter.