Preheat oven to 375 degrees F and coat a 9×13 baking pan with a little nonstick spray.
In a large skillet over medium-high heat, drizzle a little olive oil and brown the turkey sausage, cooking until crumbled and slightly cooked through.
Next, add in the chopped onion, zucchini, mushrooms, garlic, Italian seasoning, red pepper flakes and salt/pepper. Sauté everything together until the veggies are tender and then add in 1 cup each of the marinara sauce and vodka sauce. Let that simmer while you prepare the pasta.
Bring a large pot of salted water to a boil. Once the water is boiling, cook the ziti noodles until al dente, according to the package directions, and stir the pasta occasionally. When the pasta is finished cooking, use a colander to drain the water, and then transfer the pasta to the casserole dish.
Turn off the heat of the veggie marinara mixture and add in the spinach leaves, mixing well until they start to wilt. Transfer this mixture over the noodles in the casserole dish.
Pour in the remaining marinara and vodka sauce, the cottage cheese and the parmesan cheese. Mix everything well, until fully combined. Top with shredded mozzarella cheese.
Cover the ziti with foil and bake in the oven for 20 to 25 minutes until the casserole is hot and bubbly around the edges. Remove the foil and broil the dish for 1-2 minutes to get the top golden and bubbly.
Remove from the oven and let cool slightly before serving. Top with fresh basil and enjoy!