Preheat oven to 375°F (190°C) and line a baking sheet with parchment paper.
Place the cottage cheese and eggs into a high-speed blender and process until completely smooth with no visible curds.
In a medium mixing bowl, whisk together the oat flour, baking powder, and sea salt.
Pour the liquid cottage cheese mixture into the dry ingredients and stir with a spatula until a uniform, sticky dough forms.
Divide the dough into 4 equal portions and place them onto the prepared baking sheet.
Shape each portion into a smooth round disc approximately 1 inch thick.
Sprinkle the tops with sesame seeds, pressing lightly so they adhere to the dough.
Bake for 22 to 25 minutes, or until the buns have risen and the surfaces are golden brown.
Transfer to a wire rack and allow to cool completely before slicing to ensure the internal structure sets properly.