Amounts are very flexible. Just add till it looks good to you
Boiled chickpeas - amount as in 1 can
Gherkin - 2 big ones, cubed
Cucumber - about 1/4, cubed
Hard boiled egg - 2
Red onion - 1, fine dice
Mustard - your choice, 1-2 teaspoons
Kashmiri chili powder - optional, just a dash
Salt - to...