Blend oats into flour. Add banana, eggs, protein powder, milk, cinnamon. Blend until smooth.
1 cup gluten-free rolled oats (certified low-FODMAP), ½ ripe banana (45g - safe portion), 2 large eggs (or flax eggs for vegan), ½ tsp scoop unflavored whey protein isolate (28g), ¼ cup cinnamon, ½ tsp lactose-free milk