I tried this recipe out because I was curious about pepper rasam. I got the ingredients and the recipe of this site and modified it heavily. This recipe serves 4 people

Ingredients

1 tsp Cooking Oil
1/2 tsp Cumin seeds
To taste a few curry leaves
1/2 tsp Ghee
1/2 tsp Pepper
3 Red chilli
To taste Salt
1/2 tsp Tamarind paste
2 tsp Thuvar dhall
1/4 tsp Turmeric
3-5 cups Water

Procedure

Fry thuvar dhall, 1/2 t.spoon cumin seeds, pepper, red chilli, and curry leaves in oil.

Wet grind the above mixture.

Fry 1/4 t.spoon cumin seeds and 1 red chilli, Garlic in ghee.

Add tomatoes and turmeric and wait till they get almost mashed up.

Add the ground masala and lighten it up by adding water.

Add tamarind paste and salt. Let this mixture boil for a few minutes