vegetable oil • large onion, peeled and cut into small pieces • fresh coriander, roughly chopped • small green chilli, chopped into small pieces (or one teaspoon chilli powder) • large cauliflower, leaves removed and cut evenly into eighths • large potatoes, peeled and cut into even pieces • cans diced tomatoes • fresh ginger, peeled and grated • fresh garlic, chopped • cumin seeds • turmric powder • Salt •