Firstly add 2 tablespoon of sesame oil and when the oil is hot
Add mustard seeds, fenugreek seeds, and curry leaves; saute let them splutter
Add garlic and saute for 1 minute or till they start to change color
Furthermore add small onion and sauté for 2 minutes till onions turn translucent
Add tomatoes and give a quick mix for 30 seconds
Turn down the flame to low add salt, turmeric powder, sambar powder, and saute in low flame for one minute
Add tamarind paste and give a quick mix
Furthermore add water and boil
Add pepper powder and boil the kuzhambu for 15 minutes; stirring in between
Finally, add jaggery and cook for 10 minutes or till kuzhambu comes to your desired thickness