Preheat the oven to 215°C.
Place the cauliflower florets in a non-stick roasting tin, drizzle with enough oil to very lightly coat, and season generously with salt. Roast for 15–18 minutes.
While the cauliflower is roasting, whisk all the Kung Pao sauce ingredients together in a bowl until combined.
Pull the cauliflower from the oven and pour the sauce all over, add the dried chillies and use tongs to turn and coat the cauliflower pieces in the sauce. Return the roasting tin to the oven.
Roast for another 15 minutes, stirring and tossing the cauliflower a few times during cooking to prevent burning.
Remove and scatter with the spring onions, peanuts and fried shallots, and serve with rice.
