Clean the siru keerai thoroughly, wash and drain well.
In a pressure cooker, add keerai, onion, red chillies, turmeric, tamarind, salt, and a little water.
Pressure cook for 3 whistles until soft.
Let the pressure release and check the cooked keerai.
Mash the keerai using a wooden mathu until soft.
Heat oil in a clay pot or pan, add garlic and sauté until slightly golden.
Add sliced onions and cook until translucent.
Add the mashed keerai and mix well.
Add chilli flakes and adjust spice.
Let it simmer for a 3 minutes and serve hot.