Blend the cottage cheese, eggs, milk, maple syrup, and vanilla until completely smooth and creamy.
Whisk the oat flour, vanilla protein powder, baking powder, and salt in a mixing bowl.
Pour the blended cottage cheese mixture into the dry ingredients. Stir just until combined, then let the batter rest for 5 minutes to thicken.
Blend the cottage cheese, Greek yogurt, maple syrup, vanilla, and salt for the custard until silky. Refrigerate while the pancakes cook.
Heat a nonstick skillet over medium-low heat and coat it with a thin portion of the avocado oil. Add 1/4 cup batter for each pancake.
Cook for 2 to 3 minutes, until the edges look set and bubbles appear. Turn and cook for 1 to 2 minutes, adding the remaining avocado oil between batches as needed.
Stack the warm pancakes and spoon the chilled vanilla custard generously over the top.