Spray a 3-quart baking dish (9x13 inch) with cooking spray and set aside.
Cooking Spray
Add a large pinch of salt and at least 4 cups of water to a cooking pot and bring it to a boil.
Large pinch Salt, 4 c Water
When the water is bubbling quickly, add your pasta of choice and cook for 2 minutes less than the package says (for example: if it says 9-11 minutes, cook for 7 minutes). Stir occasionally to keep pasta from sticking.
16 oz Pasta of Choice
Cut the zucchini into large chunks.
2 Zucchini
Add the marinara, zucchini, cottage cheese, and seasonings to a blender or food process, and process until smooth. Use the rubber spatula to scrape the sides down if needed.
24 oz Marinara, 16 oz Cottage Cheese, 1 Tbs Italian seasoning
Preheat the oven to 400℉.
At this point, the pasta should be done. Strain the water out of the pasta, reserving about ½ c of the cooking water (this will make your pasta creamy and delicious). Add the pasta and the cooking water back into the pot.
Add the blended sauce to the pot, and stir the pasta, water, and sauce together until mixed well. It should be smooth, but not watery.
Spoon half of the pasta mixture into your baking dish. Top with 1 cup of grated mozzarella, and ½ c of grated parmesan.
2 c Grated mozzarella, 1 c Grated parmesan
Repeat the same steps: spoon the rest of the pasta on top of the first layer, then add the rest of the mozzarella and the rest of the parmesan. Optional: top with another sprinkle of Italian seasoning.
Bake at 400℉ for 25-30 minutes, until the cheese is melted and browned and the sauce is bubbling.