Preheat your oven to 180°C (350°F). Cut the zucchini into 5 mm / ¼ inch slices. place them on a parchment-lined baking tray, drizzle with extra-virgin olive oil, sprinkle with salt (and pepper if you like), then bake for 10-12 minutes until soft and lightly golden.
While the zucchini bakes, make the tomato sauce. Heat a saucepan with a drizzle of olive oil over medium heat. Add the chopped onion and sauté until soft and translucent. Pour in the tomato passata and add a few fresh basil leaves. Let the sauce simmer on low heat for 15–20 minutes, stirring occasionally, then season to taste and remove from the heat.
Spread a ladle of tomato sauce over the bottom of your baking dish. I use a 26 x 17 cm (10.5 x 7 inch) baking dish, but a slightly smaller one works just as well.
Arrange a layer of baked zucchini slices, slightly overlapping them. Spoon over some tomato sauce, sprinkle with grated Parmesan, add chopped mozzarella, and scatter a few fresh basil leaves. Repeat the layers — zucchini, tomato sauce, Parmesan, mozzarella, and basil — until all the zucchini slices are used.
Finish with a layer of tomato sauce, then top with Parmesan and mozzarella and drizzle with olive oil. Bake in the oven at 180°C (350°F) for 15-20 minutes, until golden and bubbly. Remove from the oven, let the zucchini parmigiana rest for 10 minutes, then serve warm or at room temperature.
Notes
Storage Tips: Let the zucchini parmigiana cool completely, then cover and store in the fridge for up to 3 days. Reheat in the oven or enjoy cold or at room temperature.You can also freeze it for up to 1 month — thaw in the fridge overnight before reheating.
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The information shown is an estimate provided by an online nutrition calculator. It should not be considered a substitute for a professional nutritionist’s advice.