Heat a griddle or large frying pan with a little oil.
Place the two sides of cabbage (inside down) onto the pan and griddle for approx 5 minutes on a medium heat until nicely charred.
Remove from the pan and cut lengthways into quarters.
Add back to the pan, uncooked sides down and griddle for a further 5 minutes. Remove from the heat.
Add the four quarters to a baking tray with a little more oil and pinch of sea salt.
Bake for 15 minutes on 180c or until the cabbage is soft on the inside and crispy on the outside.
To make the curry
Add the oil to a large frying pan and heat to a medium heat. Add in the mustard and cumin seeds until they pop, then add in the remaining spices. Stir for a few seconds, then add in the onion. Fry for approx 8-10 minutes until soft and browning.
Add in the garlic and ginger and stir for another few minutes, then add in the chopped tomatoes.
Cook for a further 3-4 minutes, then add the water and frozen peas. Simmer for 5 minutes. Season well. Stir in the coconut yogurt.