Preheat oven to 425 degrees. Lightly oil an 8-inch square baking dish; set aside.
In a medium bowl, stir together cream cheese and ricotta; season with salt and pepper. In another medium bowl, combine zucchini, garlic, and oregano; season with salt and pepper, and toss to combine.
Spread 1/3 zucchini mixture in prepared baking dish; top with two lasagna noodles, then 1/3 ricotta mixture. Repeat twice with remaining zucchini mixture, noodles, and ricotta mixture, finishing with the ricotta mixture. Sprinkle with mozzarella.
Cover baking dish with aluminum foil; bake until bubbly and noodles are tender, 30 to 35 minutes. Remove foil; bake until golden brown, 15 to 20 minutes more. Let stand 10 minutes before serving.