Masala Dosa

• Dosa Batter

For the potato masala

• 500 gms potatoes
• 1 large onion sliced
• 1 green chilli or more if you like it spicy, halved
• ½ tsp urad dal
• ½ tsp channa dal
• 12 curry leaves
• ½ tsp cumin seeds
• ½ tsp black mustard seeds
• ¼ tsp turmeric powder
• ¼ tsp red chilly powder
• salt to taste
• 2 tbsp vegetable oil