01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, toss the cauliflower florets with olive oil, salt, and black pepper until well coated.
03 - Spread the cauliflower in a single layer on the prepared baking sheet. Roast for 25–30 minutes, stirring halfway through, until golden and tender.
04 - In a small bowl, combine chopped pistachios, parsley, mint, garlic, lemon zest, lemon juice, olive oil, cumin, red pepper flakes, and salt. Toss until evenly mixed.
05 - Transfer the hot roasted cauliflower to a serving platter. Spoon the pistachio crunch generously over the cauliflower. Serve immediately, garnished with extra lemon wedges if desired.