saus elevates the humble potato to a fine art. belgian style fries, hand cut daily and served with your choice of condiment are their specialty. and they whole-heartedly believe in the power of the condiment, which is why they offer over 15 unique sauces, not including homemade mayo, ketchup, and gravy. try the ole chipotle (chipotle in adobo, lime juice, fresh cilantro, mayo), the sweet bill's bbq (onions, cider vinegar, spices, mesquite smoke) or the bacon parm (applewood smoked bacon, parmesan). just around the corner from faneuil hall, check out saus at 33 union st.