Pressure potatoes until tender, if you want you can add the fresh peas and cook for another whistle. If you like the taste otherwise, use it as such, it normally gets cooked fast.
Chop Onions and tomatoes roughly. Heat a pan with a tsp of oil. Roast both separately till well done. Cool, grind to fine paste.
Heat a Kadai with oil. Add whole spices. You can also use the same cooker after removing the boiled peas and potatoes.
Fry the onion paste along with ginger garlic paste. Sauté well to ensure it doesn't burn.
Then add tomatoes puree. Add chili powder, garam masala, and salt. Check spice and add more if you need.
Cook in sim for 5 mins, till its cooked well. Then add the cooked potatoes and peas. Mix well and add coriander.
Let it cook for 10 mins or till gravy thickens.
Serve with Rotis or Pooris. If you want to try differently serve this with Appam or even Dosa, it tasted great!