Step 1. Scrub and dry the sweet potatoes. Add a drizzle of olive oil, and a dash of salt. Rub the skins until evenly coated with the oil. Use a fork to prick each one several times evenly. Bake or air fry the sweet potatoes until fork tender.
Step 3: Add the tahini, cumin, salt, and lemon juice to a medium bowl. Grate or press the garlic into the bowl. Add the ice-cold water 1 tablespoon at a time until the desired consistency.