Hello, [имя друга]!
How are you? In last letter you said, that you're going to Russia and asked me to recommend place to visit, so I found one.
I think you should visit my favourite cafe in the Moscow. It's called "Kartoshka". In this place there are a lots of delicious meals, for example an awesome pancakes with jam, or a great soup with tomatoes and beef. Trust me, it's worth trying.
Well, I have to go, so see you later.
Best wishes,
[Ваше имя].