Take a Non-Stick Pan and Boil enough water to add Chopped Mustard leaves, Spinach and Green Chillies and boil them for 4-5 minutes.
Strain the content using a Strainer and Drain well
Immediately Put the boiled content in freshwater (Change the Water twice) and drain again and keep aside for 2-3 minutes.
After that, put the material in Griding Jar, add ½ cup of water and grind it and make a coarse mixture.
Heat the mustard oil in a non-stick Kadhai (Frying Pan) to its smoke point and then add cumin seeds.
Once the seeds crackle, add asafoetida, Garlic and Ginger and saute for 30-40 Seconds at medium flame.
Then add chopped onion and saute again for 2-3 minutes at medium flame.
Add Mustard Leaves and Spinach mixture along with turmeric powder, coriander powder, red chilli powder and Salt to taste and mix them all for 2-3 minutes and let the mixture cook for 2-3 more minutes at medium flame.
Serve the Hot Sarson Ka Saag with freshly prepared Makki Ki Roti. For more flavour, you can add 1 tbsp of Desi Cow Ghee (Clarified Butter) in Sarson Ka Saag.