Remove the tray from the oven and let the zucchini crisps cool on the foil for about 5 minutes. This short rest helps them firm up and become crunchier.
Gently loosen each crisp from the foil with a thin spatula. Taste one and add a tiny pinch of extra salt if needed. Serve warm, right from the tray or transferred to a plate, before they vanish.
For picky eaters, you can cut the zucchini slightly thicker (closer to 1/4 inch) so there’s a softer center under the crispy cheese, which some kids prefer. If your family likes a little extra flavor, sprinkle a small pinch of garlic powder or dried Italian herbs over the zucchini along with the salt (this technically adds ingredients, so keep it for when you’re not strictly counting). You can also swap part of the Parmesan for finely shredded cheddar or mozzarella, but stick with at least half Parmesan so the crisps still get nicely golden and crunchy. For a spicier version, add a light dusting of crushed red pepper flakes before baking. If you need these to be lower in sodium, reduce the salt and rely mostly on the cheese for seasoning. Food safety tips: Always wash the zucchini well under running water and dry before slicing. Use a sharp knife or mandoline carefully, keeping fingers away from the blade; for kids helping in the kitchen, let them handle only the cheese sprinkling. Bake until the cheese is fully melted and bubbling so the crisps are thoroughly heated. Store any leftovers in an airtight container in the fridge and re-crisp in a hot oven for a few minutes; do not leave cooked zucchini with cheese at room temperature for more than 2 hours.
