Cook dal with little turmeric and 2 drops of oil (turmeric and oil help dal to cook fast).
Cook vegetables separately (I add little salt while cooking vegetables).
Heat 1 tspn oil and fry ingredients from chana dal to red chillies.
Add coconut and fry for 2-3 minutes.
Grind to a thin paste along with tamarind.
Heat cooked dal, add vegetables, ground masala and salt.
Add half the amount of coriander leaves while cooking.
Heat for 5-10 minutes.
Garnish with coriander leaves.
Heat 1 tspn oil. Add mustard seeds, when they start popping, add curry leaves.
Add this seasoning to the cooked sambar.
Serve hot with rice.