Roasted zucchini and onions are layered with mozzarella and baked into a light yet satisfying dish, with a soft, savory center and a golden-brown finish.
Toss zucchini and onion with olive oil, salt, and black pepper.
Spread on a baking sheet and roast for 20 minutes, until softened.
Transfer the roasted zucchini to a plate.
Reduce oven temperature to 350°F (180°C).
In a bowl, whisk together eggs, parmesan, and panko. Add the roasted zucchini and mix to combine.
Assemble in a greased 7×11-inch baking dish: add half of the zucchini mixture, spread ¾ cup mozzarella evenly, then add the remaining zucchini mixture.
Top with ¼ cup mozzarella.
Bake for 20-25 minutes, until set in the center.
Optional: broil for 3–5 minutes until lightly golden.
Let sit for 5–10 minutes before slicing. Bon appétit.