We different eatery culture, however diminishing, then the west. Some key kitchen elements are missing like knife and fork. No dining table and eating with left hand is serious matter. While eating talking is not expected and eating with guest for host is not welcoming manner. Hosts take their meal only after serving the guest. Basically they want to focus on service being attentive to you. This is the sign of politeness and part of our culture.
Some of Nepalese are vegetarians for religious or moral reasons and even eggs are often avoided.
Very common food is Dal Bhat Tarkari - source of heavy carbohydrate. We take twice a day as breakfast and dinner. But you can find major European food item in every touristic hotels and restaurants.