Blended zucchini adds extra creaminess to create a silky smooth dressing in this super-low-fat version of a classic Mediterranean tahini sauce. This base recipe can be further flavored with fresh herbs such as parsley, cilantro, tarragon, or basil, and/or dried spices like cumin, smoked paprika, and chipotle chili powder. Drizzle it over hearty salads or falafel bowls, or use it as a refreshing dip for chopped veggies.