Prepare all vegetables by washing thoroughly. Shred the cabbage, julienne the carrots, and dice the cucumber into small, uniform pieces.
In a large mixing bowl, combine the shredded cabbage, julienned carrots, green peas, and diced cucumber.
If using optional ingredients like red onion, tomato, or green chili, add them to the bowl.
Add the freshly chopped cilantro and sprinkle the chaat masala evenly over the vegetables.
Squeeze fresh lime juice over the salad ingredients and add salt to taste.
Gently toss all ingredients together until the vegetables are evenly coated with the lime juice and spices.
Let the salad rest for at least 5 minutes before serving to allow the flavors to meld together.
Taste and adjust seasonings if needed before serving.