
Crispy Zucchini Casserole
Layered zucchini and yellow squash with pesto and marinara under a crispy Parmesan-panko top — somewhere between a side and a very light lasagna.
Overview
Ingredients
Equipment
- 9x12-inch baking dish
- Kitchen towel
- Large bowl
Method

Preheat and oil the dish
Preheat the oven to 375°F and oil a 9x12-inch baking dish.

Dry the squash
Spread the sliced squash on a kitchen towel to remove excess moisture.

Toss with pesto
Toss the zucchini, squash, and onion with pesto.
Spread the marinara
Spread the marinara over the bottom of the baking dish.

Layer the vegetables
Arrange the zucchini mixture evenly over the sauce.

Add the topping
Sprinkle with panko and Parmesan.
Finish the top
Drizzle lightly with olive oil and add red pepper flakes.
Bake
Bake for about 25 minutes, until the zucchini is tender but not mushy.
Optional broil
Broil briefly at the end if you'd like a darker, crispier topping.

Cool before slicing
Let cool for about 20 minutes before slicing.
Tips
Nutrition
Storage
Frequently asked
Can I make it vegan?+
Yes — use vegan pesto and marinara and swap the Parmesan for nutritional yeast or a vegan grating cheese.
Can I prep it ahead?+
Assemble up to a day ahead and refrigerate; add the topping just before baking so it stays crisp.
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