Preheat oven to 350 degrees. Lightly grease a 9 x 13 baking dish.
In a mixing bowl, combine cream cheese, sour cream and cottage cheese. Beat until smooth.
Layer bottom of baking dish with 1/2 with cooked spaghetti noodles. Spoon cheese mixture over noodles. Then, add a layer with 1/2 of spaghetti sauce. Repeat layers.
Top off final layer with cheddar cheese.
Bake uncovered for 30 minutes or cheese is melted and bubbly.
Video
Notes
This casserole is delicious, but, very filling. You may want to start out with smaller portions that you would normally have for pasta :)