Take a pressure cooker and add in green peas, chopped Onions, tomato, green chilies, ginger, garlic, red chilli powder, turmeric powder, masala powder, and salt. Pressure by adding 2 cups of water for 4-5 whistles.
Heat oil in a pan and splutter mustard seed, onion, curry leaves red chilies and saute till done.
Add this seasoning into the cooked green peas curry and serve with Appam, idiyappam, chappati...
Recipe by Kerala Cooking Recipes at https://www.keralacookingrecipes.com/green-peas-curry-green-peas-masalamattar-masala/