01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - Toss zucchini rounds with 2 tbsp olive oil, salt, and pepper. Spread in a single layer on the prepared baking sheet.
03 - Roast zucchini for 18-20 minutes, flipping halfway, until golden and just tender.
04 - Heat remaining 1 tbsp olive oil in a skillet over medium heat. Add breadcrumbs and toast for 2-3 minutes, stirring, until golden.
05 - Remove skillet from heat. Stir in lemon zest, parsley, basil, thyme, garlic, and Parmesan. Mix well.
06 - Transfer roasted zucchini to a serving platter. Sprinkle generously with the lemon herb crumble. Serve immediately, garnished with extra herbs or lemon zest if desired.