Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper or lightly grease it. This helps prevent sticking and makes cleanup a breeze. Slice your zucchinis into thin, even rounds so they bake uniformly.

Place the zucchini slices in a bowl and toss with olive oil, salt, and pepper. Make sure each slice gets a light coating—this is key for flavor and crispiness. You can use your hands or a spoon, but make sure it’s evenly distributed.

Lay the slices in a single layer on your baking sheet. Sprinkle shredded Parmesan over each slice generously. Bake for 20–25 minutes, or until the cheese is golden and slightly crisp around the edges.

Let them cool for a few minutes—they’ll crisp up more as they cool. Serve warm as a side dish, appetizer, or mid-day snack. Optional tip: a little squeeze of lemon juice on top can brighten things up beautifully.