Speedy lamb spinach curry

Name: Speedy lamb & spinach curry
Ingredients: ½ tsp cumin seeds; 2 tsp sunflower oil; 200g lean lamb steak, cubed; 1 red pepper, deseeded and sliced; 1 green chilli, deseeded and sliced; 2 tbsp mild curry paste; 225g can chopped tomato; 160ml can coconut cream; 100g bag baby spinach; ½ a 20g pack coriander, chopped (about 1 tbsp)