Combine 3 eggs, pecans, onion, cottage cheese and soy sauce in a food processor until smooth. In a separate bowl combine carrot, breadcrumbs and oats. Then mix the egg mixture into the dry ingredients. Place the filling in the middle of the pastry sheets and roll into a log. Cut into the desired size, and place on a lined baking tray. Finally, brush rolls with a beaten egg and sprinkle with sesame seeds. Cook for 20mins or until golden in a hot oven (200 degree Celsius).