Preheat the oven: Set to 350°F (175°C).
Lightly grease an oven-safe bowl or 2 small ramekins.
Blend the base: Add cottage cheese, egg, oats, banana (or sweetener), baking powder, vanilla, and salt to a blender. Blend until very smooth, 20–30 seconds. If using protein powder, add it and pulse again.
The batter should be pourable but thick.
Taste and adjust: For more sweetness, add a touch of honey or maple. For a thicker, cake-like bowl, add a tablespoon more oats.
Fold in extras: Stir in chocolate chips, blueberries, or nuts if using. Don’t blend them.
Pour and bake: Pour into your prepared bowl.
Bake 18–24 minutes, until the center is set and a toothpick comes out mostly clean. For a gooier, custardy center, bake on the lower end of the range.
Finish and serve: Let cool 2–3 minutes. Add toppings like berries, a drizzle of maple syrup, or a spoonful of peanut butter.
Eat warm with a spoon.