In a medium-sized mixing bowl, mix together the oat flour with the sunflower seed oil, baking powder, Kosher salt, whole egg, Greek yogurt, and maple syrup.
Whisk the ingredients together until no lumps in the batter remain, and the batter has a smooth consistency.
Fold in the finely-chopped pecans.
Heat a non-stick pan or pancake griddle to medium heat, and add a few teaspoons of butter to the pan.
Add a large spoonful of the pancake batter to the pan, and cook on both sides until golden brown.
Repeat the process with the remaining pancake batter.
Serve hot, with extra softened butter and warm maple syrup.