Microwave garam masala vegetable curry

Name: Microwave garam masala vegetable curry
Ingredients: 1 tbsp coconut oil; ½ onion finely chopped; 1 tsp ginger paste; 1 tsp garlic paste; 1 tbsp tomato purée; ½ tsp turmeric paste or 1 tsp ground turmeric; 2 tsp garam masala; ½ tsp cumin; ½ tsp ground coriander; 400g can chopped tomatoes; 50g baby spinach leaves, washed; 400g can chickpeas drained; 100ml coconut milk; 1 tbsp finely chopped coriander plus 1 tbsp chopped coriander leaves to garnish; 1 tsp lime juice; basmati rice or naan, to serve