Heat oil in a pan and temper with cumin seeds. Next add the slit green chilies, red chilies, ginger and saute for 2-3 minutes.
Add the sliced onions and saute till translucent.
Now add the chopped tomatoes and saute till cooked and mushy.
Once tomatoes are well cooked add salt,turmeric powder and coriander powder. Mix and cook for 4-5 minutes.
Now add the mashed toor dal and mix well. Also add 1 cup dal cooked water or normal water.
Simmer the dal until it thickens a bit for around 6-8 minutes. Add garam masala powder and mix well.
Add chopped cilantro leaves and kasuri methi.
Remove from flame lemon juice mix well and serve dal fry hot.