Bun tikki is a popular Indian street food dish made with a spicy potato patty served in a bun. The potato patty is made with mashed potatoes, spices, and herbs, which are shaped into round patties and shallow-fried until crispy. The bun is usually toasted and then filled with the potato patty, along with chutneys, onions, and tomatoes. It is a delicious and filling snack that is perfect for any time of the day.