Roasted Red Pepper and Garlic Bean Dip

Name: Roasted Red Pepper and Garlic Bean Dip
Ingredients: 1 head garlic; 1 tablespoon olive oil; Kosher salt and freshly ground pepper; One 16-ounce can cannellini beans, rinsed and drained; One 16-ounce can garbanzo beans (chickpeas), rinsed and drained; 2 roasted red bell peppers from a jar or grilled, peeled and seeded; 2 tablespoons ground cumin; 1 tablespoons tahini; Juice of 1/2 lemon; 2 teaspoons granulated garlic; 2 teaspoons granulated onion; Pinch cayenne pepper (or more as desired); 1/4 cup chicken or vegetable stock; Fresh tortilla chips, for serving