Preheat the oven to 180 degrees Celsius and have an oven safe tray ready.
In a large mixing bowl add the cauliflower, potato and brussel sprouts. Mix with the oil and spices until covered. Arrange in the oven safe dish and roast for 20 minutes.
In the meantime, mix the coconut milk with the tamarind paste and after 20 minutes of cooking time, carefully pour the coconut milk over the veggies.
Roast for a further 20 minutes, and serve with fresh sprouts and your choice of side.