Thinly slice the zucchini. Spread the slices out and add salt, pepper and garlic powder.
Spray two 10 oz. ramekins with no-stick spray. Add a layer of zucchini slices to the bottom.
Add 1 tablespoon of ricotta cheese to each ramekin and spread across the zucchini.
Cover the cheese and zucchini with spaghetti sauce, then mozzarella cheese.
Do another layer of zucchini, ricotta, spaghetti sauce then mozzarella.
For the final layer add zucchini, spaghetti sauce and mozzarella.