01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, combine cauliflower florets with olive oil, sea salt, and black pepper, tossing until evenly coated.
03 - Arrange the cauliflower in a single layer on the prepared baking sheet. Roast for 25 to 30 minutes, turning halfway through, until golden and tender.
04 - In a small bowl, whisk tahini, lemon juice, olive oil, minced garlic, ground cumin, and sea salt. Gradually add water, one tablespoon at a time, until the sauce reaches a smooth, pourable consistency.
05 - Transfer the roasted cauliflower to a serving platter. Drizzle generously with lemon tahini sauce. Garnish with chopped parsley, toasted sesame seeds, and optional lemon wedges. Serve warm or at room temperature.