Pre-heat oven to 400 degrees F and line a baking sheet with foil.
Add zucchini and delicata squash and toss with olive oil, salt and pepper. Roast in the oven until veggies are soft and caramelized, about 15-20 minutes. When done, set aside.
In another pot, cook ziti in boiling water about 2 minutes less then package instructions. You still want the ziti to have a bite to it. When done, strain through a colander and set aside. You can also toss ziti with olive oil so it doesn't stick. In the same pot, cook the spinach until wilted.
Ladel heirloom tomato sauce on the bottom of a casserole dish. Add the pasta to the rest of the sauce and toss to combine. Pour the pasta into the baking dish along with the roasted veggies and spinach. Toss to combine.
Dollop with spoonfuls of ricotta cheese and top with squash blossoms, fresh basil, freshly grated Parmesan cheese and a drizzle of olive oil.
Bake at 375 degrees F for 30minutes, covered with foil, or until the cheese is all melted.
Allow to cool slightly before serving.