Fry the onion in oil until glossy. Add the ginger and garlic, and fry for another minute; then add the mince, browning it and breaking it up with a spatula. Then add the curry powder and tomato paste and fry for another minute. Stir in the stock and vegetables, and cook until reduced – about 15 minutes.
Stir in the coconut milk, herbs and peanuts and heat through. Serve with rice.