I took 1 sliced onion and garlic and dry roasted it. Traditionally people use raw onion in this. This increases self life little bit.

I soaked tamrind in 1 tbsp of water and just used pulp. Using whole tamrind is not recommended as tamrind veins are difficult to grind and get nice texture.

Soak Red chili in warm water for 15-20 mins

In mixter add onion, tamrind, garlic, red chili, salt, roasted chickpeas. Grind it once on slow power. Add oil and increase power. Make fine paste of it

In case if you like add tadka of oil, curry leaves, cuminseeds, musturd seeds and hing.

Not only with mysore masala dosa, it taste good with anything.