Koshimbir is a refreshing Maharashtrian salad made with cucumber, tomatoes, onions, and a tempering of mustard seeds and curry leaves. It is a simple and healthy dish that can be enjoyed as a side dish or as a light meal. The salad has a crunchy texture and a tangy flavor that is perfect for hot summer days. Serve this Koshimbir chilled for a refreshing and nutritious treat.