1/4 cup [85 g] tahini
Juice of 2 lemons
1 garlic clove, minced
2 Tbsp cold water
2 Tbsp extra-virgin olive oil, plus more for cooking
Freshly ground black pepper
2 medium heads romanesco, trimmed and chopped into 1-in [2.5 cm] florets
1/4 cup [45 g] golden raisins
2 Tbsp Vegetable Stock (page 222) or water
1 Tbsp ground sumac
Flaky sea salt
Best-quality olive oil for drizzling
In a small bowl, combine the tahini with the lemon juice, garlic, and cold water. Whisk in the extra-virgin olive oil. The sauce should be thin enough to drizzle with a spoon. (If it is too thick, add in more cold water, 1 Tbsp at a time.) Season with kosher salt and pepper.
Heat a large frying pan over high heat. Add enough extra-virgin olive oil to coat the bottom of the pan, and warm until hot but not smoking. Add the romanesco, cut-side down, and cook until deep golden brown in color, 3 to 4 minutes. Stir with tongs or a wooden spoon and cook for 2 to 3 minutes longer.
Turn the heat to medium and add the raisins. Season with kosher salt and cook, stirring, until the raisins soften, 1 to 2 minutes. Add the stock and allow the ingredients to steam briefly. Taste a piece of romanesco for seasoning and doneness; it should be tender.
Transfer to a serving platter, drizzle the tahini sauce on top, sprinkle with sumac, and garnish with sea salt and a drizzle of best-quality olive oil. Serve warm or at room temperature.