Soak a small lemon sized tamarind in hot water and extract 1.5 cups of thin tamarind extract.
Cut the veggies into medium sized cubes. If using mochai pressure cook this separately and add.
In a pan dry roast 2 tbsp of sesame seeds till it is golden brown. Take out and keep it aside.
In the same pan add 2 tsp of oil and add the toor dal, urad dal, coriander seeds, raw rice, venthayam and red chili.
Roast till the dal becomes golden brown.
Take out and add to the mixie jar.
Add the coconut and roasted sesame seeds to this.
Grind this into a paste by adding water.
In a pan add the veggies and add the tamarind extract, turmeric powder, salt and asafoetida.
Let the veggies cook till it becomes soft.
Do not overcook this.
Now add the ground coconut paste to this.
Mix well and add1 cup of water to adjust the consistency.
Add ½ tsp of jaggery to this and mix well.
Let this boil for 3 minutes.
Switch off the flame.
Temper mustard seeds and curry leaves in 3 tsp of sesame oil.
Mix well.
Thalagam is ready.
Traditionally it is served with Thiuvadirai kali.
You can serve this with plain rice too.