Heat oil in a pan and add mustard seeds.
When seeds starts crackling add asafoetida,curry leaves and green chilies.
Now add turmeric powder and grated cabbage and saute for few seconds.
Then add capsicum julienne s, grated carrot, salt and mix well.
Cover the pan with a lid and cook on medium flame for 2 minutes or till slightly cooked but remain crisp and crunchy.
Add sugar and lemon juice, mix well and remove from the gas stove.
Serve hot or at room temperature