Over medium hgih heat; warm the oil in the bottom of a large stock pot.
Add the cumin seed and toast in the oil until fragrant
Add the onions and cook until they are translucent
Add the garlic to the pan and cook, stirring, until the raw garlic aroma begins to go away
Add the toor dal and the ground turmeric and water mix to combine
Bring to a boil; reduce heat; stir occasionally and allow to simmer until the dal is tender.
Place all of the lentils, chilies, coriander, fenugeek, coriander and peppercorms into a dry skillet.
Add the curry leaves and dried chilies. Toast the spices, shaking the pan frequently until the curry leaves begin to curl and dry.
Remove the pan from the heat and remoce the toasted spices from the pan
Add the turmeric to the toasted spices and allow the mix to cool
Place in a coffee or spice grinder and grind the mix to a fine powder.
In a separate pan, heat a bit more oil and add potatoes, beans, okra, peas and carrots toss together until warmed through.
Add in tomatoes, Sambar blend, and the hing
Cook until the mix begins to get dry, remove from the heat.
Add the cooked dal to the pan with the potatoes and vegetables. Stir to cook together until thick and heated through
Add the hing and the tamarind pulp. Hold over a warm burner
Heat the ghee in a separate skillet.
Add the fresh red chilies and mustard seeds. Cook until the seeds pop and the chilies blister slightly and add this mix to the sambar pot, reserving the chilies to individually top each serving.
Taste and adjust seasonings accordingly; adding more sambar or tamarind as needed.
Serve in bowls; top each serving with one of the blistered chilies