Cauliflower Shawarma with Pomegranate Tahini and Pine Nuts

Name: 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