There is a restaurant called Rusky Dvorik (Russian courtier) which is quite good, but also expensive taking into consideration the general price level of Russian province. It is located just in front of the entry of the monastery.
Inside the monastery (entering through the main gate and going to the left) there is a really good bakery-pastry, with local products that seem to be very popular among Russian visitors.
There is also a McDonald's restaurant on the modern part of the town.