Zucchini Casserole

2 tablespoons of olive oil
2 lb of zucchini, slice
1/2 teaspoon of salt
1/4 teaspoon of pepper
1/2 teaspoon of garlic powder
1 onion diced
1  teaspoon dried basil
1 can diced tomatoes. drained
1 cup Hellman's mayonnaise
1 cup grated Parmesan cheese
Sautee' zucchini and onions in olive oil. Add one can of diced tomatoes. Add salt pepper garlic powder and basil. Cook until onions are done. Pour into a casserole dish that has been sprayed with Pam. Mix one cup of Hellman's mayonnaise with one cup of Parmesan cheese. Spread on top of zucchini mixture until it covers the entire dish. Cook at 350 degrees until cheese is golden brown.  About 30-45 minutes. Let it set a few minutes before serving.