Pre-heat oven to 400 degrees
Dump box of pasta in casserole dish (about a 13inx9in)
Dump Cottage cheese and mozzarella cheese into the pan and mix together
Shred and sprinkle some parmesan cheese on top and mix again
Dump the pasta sauce in and mix
Fill the pasta sauce jar about 3/4th of the way full and dump into the pan. (I shook the jar to make sure to get all the loose sauce out of the jar).
Mix everything together and make sure the pasta is all underneath the water. (If it isn't, smooth out so it is, or add a tad more water).
Bake covered with foil for an hour.
After an hour, remove foil and check it. If it still looks soupy, cook at 5 minute intervals until the cheese is just starting to brown and most of the liquid is gone.