Bombay potato frittata

Name: Bombay potato frittata
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: Indian
Ingredients: 4 new potatoes , sliced into 5mm rounds; 100g baby spinach , chopped; 1 tbsp rapeseed oil; 1 onion , halved and sliced; 1 large garlic clove , finely grated; ½ tsp ground coriander; ½ tsp ground cumin; ¼ tsp black mustard seeds; ¼ tsp turmeric; 3 tomatoes , roughly chopped; 2 large eggs; ½ green chilli , deseeded and finely chopped; 1 small bunch of coriander , finely chopped; 1 tbsp mango chutney; 3 tbsp fat-free Greek yogurt