Akoori (Indian scrambled eggs)

Name: Akoori (Indian scrambled eggs)
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: Indian
Ingredients: 1 tbsp butter; 1 small red onion , finely chopped; 1 green or red chilli , deseeded and finely chopped; 2 garlic cloves , crushed; ¼ tsp ground cumin; ¼ tsp garam masala; good pinch of turmeric; 2 large tomatoes , deseeded and finely chopped; 7 eggs , beaten; small pack coriander , roughly chopped; 4 chapatis (or gluten-free alternative), lightly toasted, to serve