I'm no expert on Nepalese food but in my experience it's fairly similar to Indian food. I was working in Plymouth 7 years ago and went for a curry at Himalayan Spice on The Barbican. I wasn't sure what i wanted and wanted to try something different so i asked the waiter. He recommended The lamb house curry which i ordered with a garlic naan, and it is in my top 10 curries I've eaten, and I've eaten a lot of curries over the years.
Nepalese people eat a meat or veg dumpling called a momo, something i haven't tried and its similar to a Chinese Bao bun which I've eaten several times.