Steps
1. Heat oil in a pan over medium heat. Add mustard seeds and cumin seeds; let them splutter.
2. Add chopped onions and sauté until translucent.
3. Add the green chili and tomatoes; cook until tomatoes soften.
4. Stir in turmeric, red chili powder, and salt. Cook the masala until oil starts to separate.
5. Add diced potatoes and mix well with the masala.
6. Pour enough water to cover the potatoes partially. Cover and cook on low heat until potatoes are tender.
7. Once potatoes are cooked, add garam masala, stir well, and cook for another 2 minutes.
8. Garnish with fresh coriander leaves and serve hot.