Pizza Della Casa is a quaint Pizza restaurant found just along Peace Avenue (as of July 2007, opposite the huge brick building with scaffolding). The prices are average to expensive and the layout is very pleasant for a quick lunch with friends. The service is good, the food is okay. Mongolians getting pizzas right on is very very rare, and as pizzas go in Ulaanbaatar, this is pretty good. 

The food is varied, offering lots of food from around mainland Europe, there are also a wide range of pastas and salads. If it was ranked out of ten, it would get a generous 7/10.