Raita is an Indian cold salad appetizer. It is made from various chopped fresh vegetables with yogurt, herbs and spices.
In a small frying pan, heat the oil strongly, add the mustard seeds, after 10 seconds. - cumin seeds. Cook another 10 sec. and remove from heat, cool.
In the meantime, peel the cucumbers (or leave the skin on if it's thin) and chop very finely. Chop up the greens.
Mix yogurt, herbs, cucumbers and oil with spices. Salt and season with chat masala to taste. Place in refrigerator for 10 minutes. and serve with tortillas.