Roasted Garlic and White Bean Hummus, Served Warm

INGREDIENTS

• 2 to 3 heads of garlic
• 3 cups cooked Great Northern beans, or other white beans, liquid reserved
• 1/3 to 1/2 cup cooking liquid or water
• 1/4 cup olive oil (plus extra to drizzle on top)
• 1/4 cup tahini
• Salt and black pepper, to taste
• 3 tablespoons lemon juice
• chopped fresh rosemary, for sprinkling on top