The marinade is my own but I followed this for the bake time.

https://cafedelites.com/garlic-herb-butter-roast-chicken/

For the sweet sauce

• melt some white and brown sugar in a pan with water
• add some spices if you like, I just added some kashmiri chilli powder (cinnamon and cardamom would’ve been nice)
• make a corn starch slurry and add it to the pan. Mix until it’s thick.