I made this.
It was very tasty, although I suspect the idea was that the lemon juice would reduce during cooking, to leave nothing but a sticky glaze, and that I should have used a larger roasting tin.
I think what he meant to say was, “put them in, skin side down, and turn them over halfway, so the skin side is up”.
Anyway, the results were very tasty, and the leftovers, below, will make for a magnificent sandwich.
I think the removal of the mustard, and the addition of ginger and soy sauce, and maybe a bit of star anise or five spice powder might be worth a go.