To prepare a tomato cucumber kachumbar recipe, first you need to prepare your ingredients. First, you'll need: Tomatoes: Peel the tomatoes and cut them into small cubes. Cut the cucumbers in half lengthwise. Then, cut each half into quarters and place them in the middle of the tomato and cucumber mixture. Add salt and pepper to taste. Cook the mixture on medium heat until it starts to turn golden brown. Remove the pan from the heat and add the chopped coriander leaves.