Heat oil then frying fenugreek, rye and fennel till them crackle. Now add potatoes and fry for while. then add ginger/ garlic paste. Salt, red chilli, powder, green chilli paste, turmeric and tomatoes and fry. When water from tomatoes dry off, add onion and cook till potatoes are tender. Sprinkle sesame on top and cover with lid and cook on low heat fro 5 minutes in the add lemon juice and mix well.