Wash and put dal in the slow cooker overnight (add 4 times water & salt). In a pan, add oil, jeera seeds, Garlic & ginger, onions and salt. Cook the onions till they are brown. Now add all the spices, Desi ghee & tomatoes & yogurt and cook for 1 minute and then add tomatoes and cook till it sheds oil.
Now blend the tadka and again mix it with rajma in the slow cooker.
(Add boiling water for desired consistency) then simmer for 30 minutes, finish with green coriander. Remove the pan from the heat and add asafoetida and then the red chili powder, coriander powder and garam masala.
Pour the tempering over the cooked dal and mix well. Add boiling water for desired consistency then simmer for 5-7 minutes finish with green coriander and drizzle fresh cream.