Looks delicious.I haven't ever had char siu pork (or char siu anything for that matter), but now I want to!
It's a pretty simple recipe.
2lbs pork tenderloin
1 star anise
1 tsp cinnamon
1 tsp ground white pepper
1/2 tsp sea salt
1/4 cup chinese rice wine or dry vermouth
6oz pineapple juice
2 tbsp soy sauce
1 tsp sesame oil
combine everything but the pork in a bag or marinating bowl, leave in fridge overnight, 1 hour minimum. skewer and then grill, high heat(say about 5 min) for a short time then low for a long time(say 10 min), basting continuously with leftover marinade. Took me a little more than 15mins on the grill overall, and came out super super tender.