Cauliflower Shawarma with Pomegranate, Tahini, and Pine Nuts

Ingredients

• 1⁄4 cup plus 1 1/2 tbsp. fresh lemon juice
• 3 tbsp. unsalted butter, softened
• 1 1⁄2 tbsp. minced cilantro
• 1 tbsp. ground cinnamon
• 1 tbsp. ground sumac
• 1 1⁄2 tsp. ground cumin
• 1⁄2 tsp. ground allspice
• 1⁄8 tsp. ground cardamom
• 1⁄8 tsp. freshly grated nutmeg
• 2 cloves garlic, minced
• 1 1⁄2 tsp. kosher salt, plus more
• 1 whole head of cauliflower, stem trimmed, leaves left intact
• 1⁄3 cup tahini
• 2 tbsp. pomegranate seeds
• 1 1⁄2 tbsp. finely chopped flat-leaf parsley
• 1 1⁄2 tbsp. pine nuts, toasted
• 1 tbsp. pomegranate molasses
• 1 tsp. dried rose petals, lightly crushed