In a large pan or casserole pot, gently cook the onion for five minutes in the sunflower oil.
Add the garlic, ginger, garam masala and curry paste, and continue cooking for three minutes over medium heat
Add the potatoes and chickpeas, and give them a stir in the spices, making sure everything is coated.
Pour in the canned tomatoes and coconut milk and bring to a steady simmer. At this stage, add a little salt and ground pepper
Continue cooking until the potatoes are soft. If the sauce feels a little dry, add a little water.
Just before serving, stir in the spinach and coriander and serve with yoghurt