large metal (or bamboo) skewers • Chicken thighs - 8 bone out, skin off, then sliced into pieces (big enough to fit on two skewers - but thin enough to cook fairly quickly) • buttermilk • little veg oil for brushing • soy sauce • sesame oil • piece ginger - grated • garlic clove - grated • black garlic paste • rice vinegar (or white wine vinegar) • ketchup • sriracha sauce •