Wash all vegetables before cooking. Boil all greens, radish and turnip roots together.
Let it cool down the greens and roots. Put it in blender or food processor.
Make a puree.
Take a pot, let it warm, add oil in the pot. Let heat the oil on medium heat, once oil is heated add mustard seeds, let it sputter. Add green chilies and red chilies and chopped onions, let it cook until light brown.
Add garlic, let it cook until light golden brown, add ginger, cook it for 1 minutes. Add wheat flour(atta) or corn flour and cook it for 3 minutes.
Add coriander powder, red chili powder, add finely chopped tomato, mango powder and Kasuri methi leaves, salt and cook for 2 minutes.
Add hot water to masala and cook it for 2 minutes. Add pureed saag to masala and cook for 5 minutes stiring with 2 minutes intervals.
Garnish with coriander leaves. Saag is ready to eat.