Allspice chicken and mango rice - suddenly, we're in the Caribbean!

I'm often drawn towards recipes for traybakes.  They always look so good, with beautifully golden roasted chicken pieces nestling amongst gorgeous roasted vegetables that have just begun to caramelise.  However, my efforts haven't always been successful in the traybake department. As such, I was bearing this in mind when I found myself drawn towards the recipe for Mango chicken, b