Heat the oil in a wok and saute the spice-paste, together with jeruk purut leaf and lemon grass until fragrant. Add the chicken and stir it around until chicken is starting to stiffen.
Pour in the santan and let it simmer until chicken is half done.
Add the thick santan and continue cooking until santan is reduced and the chicken is tender.
Mix the melted butter with the sweet soy sauce and brush it all over the chicken. Grill the pieces of chicken over a low fire (kalo aku dibakar dalam oven 25 menit)