Sichuan peppercorns are one of my favourite kitchen staples – stir-fried through hot rice, in a marinade for roast pork – and here, they work beautifully with chicken, squash, chilli and honey for a sweet and spicy traybake. Don’t overdo the Sichuan peppercorns – they’re mouth-numbing in large quantities, but if you’re a fan of chilli, by all means increase the amount – Sichuan chicken is traditionally very spicy.