mix sesame paste with sesame oil first not water (it’s every mom’s secret : add sesame oil into the sesame paste bottle can loose the big hard lump). I like to put minced garlic in the water, so even you don’t have garlic, still can get some garlic flavor from water. (it’s an important flavor for cold noodle) also, make some hot pepper oil for those who like si-chuan flavor (put red pepper powder, chopped cilantro or green onion, a little salt in the bowl, then add sizzling hot oil over it, mix & let it cool down) good job!