Peel and wash onion. Cut into two and remove the dried thick part on the top.
Take a mandoline slicer, hold the onion vertically. Slice the onion. Crush gently to separate the petals.
In a mixing bowl, place sliced onion, little salt. Mix and keep aside for 5 mins. This softens onion, brings out the flavor well as it sweats.
Take curd (plain yogurt) in a mixing bowl. Beat smoothly using a whisk.
Mix in the sliced onion, finely chopped tomato, carrot, coriander, green chilli, required salt, cream (or milk if adding) and mix well.
Adjust the consistency as needed using water/ milk.