Roasted Cauliflower with Tahini Ranch

Ingredients

• Tahini Ranch
• ¾ cup whole-milk Greek yogurt
• ¾ cup buttermilk
• ¼ cup tahini
• 2 tablespoons lemon juice
• ¼ cup minced fresh dill
• ¼ cup minced fresh chives
• 1 teaspoon onion powder
• 1 teaspoon garlic powder
• 1 garlic clove, finely grated
• Kosher salt, to taste
• Cauliflower
• 2 medium heads cauliflower, broken into florets
• ½ cup extra-virgin olive oil
• 1 teaspoon Aleppo pepper
• Freshly chopped dill and chives, for garnish