Urulai kizhangu podimas/potato podimas

Ingredients

• 4 nos Large potato
• 1 large Onion (chopped)
• 5 nos green chillies
• 1 sprig curry leaves
• 1 teaspoon urad dal
• 1 teaspoon mustard seeds
• 1 teaspoon channa dal
• 2 tablespoons oil
• Salt to taste.