First we will make Tomato Onion Paste. Take Chopped Tomatoes and Chopped Onion in a mixer grinder jar or blender jar.
Grind it to make smooth paste. Take it out in a bowl and keep it aside. Do not add water while grinding.
Now heat 3 tablespoon Oil in a pan or kadai or pressure cooker over medium heat.
Add Cumin Seeds into the oil and allow it to crackle.
Next add Chopped Chiili and Ginger Garlic Paste. Saute it for 15-20 seconds or till the paste turns light golden in colour.
Add Tomato Onion Paste and mix it. Also add Salt to it. Saute and cook it till the Tomato Onion Paste starts leaving oil.
Now add the spices such as Asafoetida, Turmeric Powder, Kashmiri Red Chilli Powder, Coriander Powder and Garam Masala. Cook for another 2-3 minutes.
Add the Chopped Potatoes and Peas (Matar). Mix it with the cooked spices. Fry for 3-4 minutes till the potatoes and peas are properly mixed with spices.
Add Chopped Coriander Leaves, mix it and fry for a minute. Add desired amount of water so that the potatoes are slightly covered with water.
Cook it over medium heat till the potatoes are properly cooked and become soft. Switch off the flame.
If you are cooking in a pressure cooker, cook over medium flame for two whistles.
Add Kasuri Methi and mix it. Aloo Matar Masala is ready. Serve it hot with Rice, Roti or Pooris by garnishing it with Coriander leaves.