Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.
In a blender or with an electric mixer blend tomato sauce and cottage cheese together until smooth. Spoon a little of the sauce mixture in the bottom of a 20x30cm baking dish. Place a layer of cooked lasagne over the sauce and sprinkle a portion of the mozzarella, the cheddar and the parmesan over the lasagne. Repeat layering of sauce, lasagne and cheese; finish with a cheese layer.
Bake in preheated oven 30 to 45 minutes until cheese is bubbly and golden.