Momos
The momos(mo:mo:) are the most popular snack in Nepal, and can be found in small eateries or street stalls a bit everywhere along Kathmandu streets. This small dumpling is made from wheat flour, filled with meat, paneer or vegetables, is one of the most popular snacks but is also common as a meal.
Chatpate
Chatpate is a popular Nepali snack that is quick and easy to make. You can find vendors in the streets mixing up the delicious snack and selling it on the spot. The tangy spicy food tastes great when every ingredient is blended in balance.
Sel roti
These deep-fry rings, made from rice flour, are a very popular Nepali breakfast; are made and sold usually during the morning in small shops on the roadside. They are a bit sweet and get crispy just after being made, which make them irresistible, but heavy for a delicate stomach.
Samosa
Apparently originated from the Middle East, the samosa is, without a doubt, a symbol of India gastronomy, especially in term of snacks, and is spread all over the country, as also in neighbouring countries. Nepal didn't escape to the samosa invasion and this snack is easy to find in the small restaurants and street stalls.
Another popular Indian snack that is easy to find in Kathmandu is the samosa chaat, usually from lunchtime until evening. This snack is made with a samosa broken into pieces, and topped with onion, tomato, yellow peas dal, fresh coriander and curd (sweet yoghurt) and seasoned with cumin powder, chilli powder and Himalayan salt..and a few drops of lime.
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It consists of a round, hollow puri, fried crisp and filled with a mixture of flavoured water (commonly known as imli pani), tamarind chutney, chilli, chaat masala, potato, onion or chickpeas.
Locals will often refer to the dish as the Nepali pizza but it could well be labelled a taco given that Chatamaris are generally folded and served with fillings. However, what sets the Chatamari apart from pizzas and tacos are the distinct Nepali spices used and the crepe which is made using rice flour.
Peas, beans, corn, chickpeas... all roasted and seasoned in a different way, usually with a salty and hot mix of species. These snacks are always sold by hawkers and can be found a bit everywhere along the streets.
Perhaps the most well-known Newari dish, the humble choila goes best with the potent Aila (Newari homemade liquor). Choila is essentially is a spiced up and neatly grilled buffalo meat, and just like the Chatamari, you can find the best ones in Newari Khaja Ghars. To eat Choila like the locals one must order Chmura (beaten rice) as a side dish - this combo rarely goes wrong and your jaws will enjoy grinding the choila and cheura together.
#SekuwaThe next meat dish on this list is the Nepali bbq meat, also known as the Sekuwa. If you're a beer lover then you have to try a chilled one with a plate of Sekuwa. While mutton is the preferred meat of choice, you will also find buffalo and chicken sekuwa served in many of the stalls. What makes the Nepali Sekuwa special is the unique combination of herbs and spices, and we'll go out on a limb here by saying that kebabs ain't got nothing on Sekuwas!
#LassiA drink blend of yoghurt, water, spices and sometimes fruits, sweetened and chill with ice is quite popular in Nepal.
#Curd (Juju Dhau)This is a rich and thick yoghurt, usually with sugar that traditionally was made in a clay pot. Nowadays is possible to find curd in many places along the city, but the traditional one from Newari region, called Juju Dhau (king yoghurt), made in clay pots are not so common.
#Nepali doughnuts (doughnuts)Almost so popular as the sel roti, the Nepali version of doughnuts is everywhere, from bakeries to small eateries. This deep-fry dough with the shape of a ring can be eaten plain or stuffed with cream.
This is Part 1 to series of street food from around the world.
Source - Quora