Clean the spinach making sure there are no weeds.
Wash the spinach very well and roughly chop it.
Place a pot of water for boiling.
Once the water comes to a rolling boil, add spinach.
after one boil, drain this water and rinse it with ice-cold water.
Now using a blender, make a fine purée of spinach.
Melt a tbsp of butter, add garlic and sauté for a minute.
Add finely chopped onion and cook till translucent.
Add 1/2 tbsp of flour and roast it for 2-3 minutes.
Add the spinach purée.
Adjust the consistency by adding milk.
Add salt and mix well.