Make the marinade for the chicken.
Clean and sweat the garlic, ginger,
shallots and galangal in a pan with oil.
Crush the lemongrass and add to the rest of the ingredients.
Add the soy sauce, sesame oil, vinegar and soybean oil and remove from the heat. Add the sambal and marinate the chicken thighs under vacuum for 24 hours.
Remove the chicken thighs from the marinade and thoroughly dab dry. Cut into equal pieces and put on a skewer.
Vacuum the skewers and cook in a sous-vide at 62°C for 4 hours.
Leave to cool and store until needed. Pass the marinade through a fine sieve and reduce to a glaze in a saucepan.