Preheat oven to 325° F. Spray 1½ quart pan with nonstick cooking spray.
Cook pasta to desired doneness and drain. Set aside.
In a bowl, blend together sour cream, cottage cheese, flour, milk and egg.
In another bowl, combine ham, bell pepper and celery, mix well.
Add all ingredients together, including the pasta and gently toss. This is the part where it will look very soupy. That is how it should look.
Pour into pan and bake 60 minutes or until heated.
Stir once you remove the pan from the oven. Upon removing from the oven, it will look like much of the liquid is gone. Don't worry, it's hiding below as the cottage cheese is heavier than just a sauce. As you gently stir the entire thing will meld together. Serve and enjoy.