Preheat oven to 350F.
Cook pasta according to package instruction, then set aside.
In a small saucepan, boil a small amount of water. Add zucchini and cook until tender. Grease a baking dish and layer 1/3 of the Rigatoni, tomato sauce, cheese and zucchini. Continue layering until you have three of each. Cover with shredded cheese and add a sprinkle of olive oil.
Bake in the oven for about 30 minutes or until cheese is melted.