Pani Puri, also known as Golgappa or Puchka, is a popular street food snack in Mumbai. It consists of crispy hollow puris filled with a mixture of spicy and tangy water, mashed potatoes, chickpeas, and tamarind chutney. The puris are filled with the mixture and eaten in one bite, creating an explosion of flavors in the mouth. Pani Puri is a favorite among locals and is a must-try for anyone visiting Mumbai.