Bhaji frittata

Name: Bhaji frittata
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: Asian, Indian
Ingredients: 2 tbsp vegetable oil; 2 onions , thinly sliced; 1 garlic clove , finely chopped; 2 tsp mild curry powder; 450g potato , coarsely grated and any excess liquid squeezed out; 6 medium eggs , beaten; 100g frozen pea; small pack coriander , roughly chopped; mango chutney, natural yogurt and naan bread , to serve (optional)