First of all prepare the Tamarind Water. Soak the seedless tamarind in water for 15-20. You can use hot water also.
Mash the tamarind with a spoon. Strain it and remove the solid part. Keep it aside.
Now heat 2 tablespoon Oil in a cooker over medium flame.
Add Mustard Seeds and Fenugreek Seeds.
When they start to splutter, add Dry Red Chilli, Curry Leaves and Asafoetida (Hing). Saute it for 10-15 seconds.
Add Chopped Onion and cook until the onion becomes translucent and light golden brown.
Now add Chopped Tomatoes and Salt. Cook till the tomatoes become soft and tender.
Now add all the vegetables such as Pumpkin, French Beans, Brinjal (Baby Eggplant) and Carrot. Also add Soaked Arhar Dal along with vegetables.
Mix them well and cook for 7-8 minutes.
After cooking the vegetables for 7-8 minutes, add Turmeric Powder, Red Chilli Powder and Sambhar Masala to it.
Mix the spices with the vegetables and cook for another 4-5 minutes. If required you can add water.
When the spices are cooked properly, add required amount of water.
Close the lid of the cooker. Cook it for 3 to 4 whistle. If required you can cook for some more time.
Switch off the stove and allow the pressure of the cooker to come down by itself.
Open the lid of the cooker and mash the vegetables and Dal. Mix it properly.
Cook the Sambhar in open cooker again for 3-4 minutes. If required, add more water to it.
Add the Tamarind Water and Chopped Coriander Leaves. Mix it. Switch off the stove and serve it hot.
Vegetable Sambhar Masala is ready. Serve it with your favourite South Indian recipe like Idli, Dosa or Uttapam