Preheat oven to 375°F (190°C). Lightly grease two 6-ounce ramekins with cooking spray or butter.

In a mixing bowl, combine protein powder, rolled oats, Greek yogurt, milk, egg, baking powder, cinnamon, and salt. Whisk gently for about 30 seconds until just combined. A few small lumps are okay - do not overmix.

Divide the batter evenly between the prepared ramekins, filling each about three-quarters full.

Bake for 18-22 minutes, or until a toothpick inserted into the center comes out clean and the tops are golden brown and spring back when lightly pressed. For a crispier top, broil 6 inches from the heat source for the last 1-2 minutes, watching carefully to prevent burning.

Let the bowls cool in the ramekins for 3-4 minutes, then add your favorite toppings and serve warm.