Saag Chicken Stew

Ingredients

• 1 tablespoon vegetable oil
• 1 tablespoon butter or ghee
• 1 large onion, grated
• 1 tablespoon grated ginger
• 2 cloves garlic, smashed
• 1 teaspoon tumeric powder
• 3 cardamom pods, pounded to split open (don't let the seeds get away)
• 1 whole cinnamon stick or 1 teaspoon ground cinnamon
• 1 chicken breast, chopped into blocks
• 2 potatoes, peeled and cut into cubes
• 100ml greek or turkish yoghurt (though plain or soy yoghurt would do)
• 8 cherry tomatoes
• 150 ml Water
• 300 g spinach (I used frozen)
• 1 coriander cube or 2 tablespoons chopped coriander/cilantro
• 2 -3 whole chilies (to taste), split
• Salt to taste