01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - Arrange zucchini slices in a single layer on the prepared baking sheet. Drizzle with 1 tablespoon olive oil and season lightly with salt and black pepper.
03 - In a small bowl, combine sesame seeds, panko breadcrumbs, Parmesan (if using), minced garlic, remaining 1 tablespoon olive oil, red pepper flakes, 1/4 teaspoon salt, and black pepper. Mix until evenly combined.
04 - Sprinkle the garlic-sesame crunch mixture evenly over each zucchini slice.
05 - Roast in the preheated oven for 20–25 minutes until zucchini is tender and the topping is golden brown and crisp.
06 - Remove from oven and let rest for 2 minutes. Transfer to a serving platter, sprinkle with fresh chopped parsley, and serve with lemon wedges alongside.