Place cottage cheese and milk in a small food processor or blender. Process on high until smooth, about 1 minute.
In a large mixing bowl, beat the eggs and sugar. Add the cottage cheese mixture and combine until blended. Add the apple and vanilla and stir to blend.
Add the flour, baking powder and cinnamon to the bowl and blend well. Do not overmix.
Coat a large skillet or griddle with vegetable cooking spray and heat over medium-high heat. Using a scant ½ cup measure, pour the batter onto the hot pan. Cook until nearly set and bubbles appear on the surface, then flip and cook until golden brown.
Dust pancakes with powdered sugar and top with more grated apples, if desired, then serve.
Per serving: Calories: 293, Carbohydrate: 34 grams, Protein: 23 grams, Fiber: 2 grams, Fat: 7 grams, Saturated fat: 2 grams, Cholesterol: 191 milligrams, Sodium: 644 milligrams, Calcium: 168 milligrams.