01 - Cook ziti pasta in a large pot of boiling salted water until just al dente. Drain thoroughly.
02 - In a mixing bowl, combine diced cooked chicken, tomato sauce, cottage cheese, and egg until blended.
03 - Gently mix the cooked pasta with the cheese and chicken mixture, ensuring even coating. Transfer to a lightly greased baking dish.
04 - Top with shredded mozzarella and bake in a preheated oven at 375°F (190°C) for 25 minutes, or until the top is golden and bubbling.