Kachumber or Kachumber Salad is a simple Indian Salad recipe made with freshly chopped onions, cucumbers, and tomatoes and flavored with fresh herbs, lemon juice, and spices. This easy and refreshing Cucumber Tomato Onion Salad is gluten-free, vegan, and oil-free. It is a staple in most Indian homes and restaurants and pairs perfectly with most Indian curries as a side.  Kachumber or Kachumber Salad is a simple Indian Salad recipe made with freshly chopped onions, cucumbers, and tomatoes and flavored with fresh herbs, lemon juice, and spices. This easy and refreshing Cucumber Tomato Onion Salad is gluten-free, vegan, and oil-free. It is a staple in most Indian homes and restaurants and pairs perfectly with most Indian curries as a side.