Remove the chicken from the marinade and coat it in the breadcrumbs. Fry all the pieces once (4–5 min) in small batches, then set them aside on a plate lined with paper towel (ideally on a rack).
Once all the pieces are fried, fry them a second time until they are nicely golden, almost orange.
Put all the sauce ingredients in a saucepan over low heat and stir until it thickens. Turn off the heat and toss in the chicken.