Start by making dhokli dough. Take all the ingredients in a bowl except oil and water. Add in oil and rub well, so it is distributed evenly. Now add water and make a dough. Cover and let it rest till you cook dal.
Take toor dal, turmeric powder and water in a pressure cooker. Cook it for 6 whistle, simmer for 10 mins. Turn off the heat and let them steam go all by itself. Now open it and mash it slightly. The dal should be completely mashed.
Now make the dal. heat oil in a pan, and add in mustard, cumin, fenugreek, cinnamon, bay leaf, curry leaves and saute for 30 seconds. Add in remaining ingredients till lemon juice and saute for 30 seconds. Now pour in cooked dal, salt, tamarind, extra water, jaggery and mix well. Bring this to a boil.
While the dal is boiling, make the dhokli, roll the dough into thin chapati. cut into diamonds.
Now when the dal boils, add in dhokli one by one. The dal should be in rolling boil, don't add it in one go, add one by one. Once everything is added, simmer the pan, cover and cook for 8 to 10 mins. Now turn off the heat and add coriander leaves, lemon juice. Mix well. Serve warm.