Blend the cottage cheese, eggs, milk, vanilla extract, and honey until smooth.
Whisk the oat flour, protein powder, baking powder, cinnamon, and salt together in a large bowl.
Stir the blended cottage cheese mixture into the dry ingredients until just combined. Let the batter rest for 5 minutes.
Melt the butter in a small skillet over medium heat. Add the walnuts, pistachios, brown sugar, and cinnamon, then toast for 2 to 3 minutes until fragrant.
Heat a lightly buttered nonstick skillet over medium-low heat. Cook the pancakes until bubbles appear, then flip and cook until golden and set.
Warm the honey, water, and lemon juice in a small saucepan for 1 minute to make the syrup.
Stack the pancakes, spoon the honey syrup over them, and cover with the toasted walnut and pistachio mixture.