1.Peel ,remove and cut cucumber into small cubes .
2. Peel and slice and garlic .
3. Boil together the above three ingredients with a little salt .
4. Grind to a fine paste green chillies ,coconut and cumin if used .
5. Beat curds till smooth .Add boiled vegetables ,finely crushed mustrds .
6. Check for seasonings and bring to boil .
7.Heat oil,add sliced onions and curry leaves .
8. When onions brown ,add mustard seeds and as the seeds crackle pour over pachadi. Mix well .