I would reccomend this for lunch. They often have a lunch special that is a good deal and it is very clean and reasonable for San Blas.

My wife and I are staying in Cusco and learned very quickly that one of the best ways to avoid altitude sickness is to eat a larger meal at lunchtime and then eat a very small meal at dinner. We asked our hotel (Torre Dorada) for a recommendation and were referred to the Granja Heidi, which is located just a couple of blocks outside the main Plaza de Armas square.

It´s kind of a hole in the wall place from the street level, but once you ascend to the second floor, you´re in for a treat. The interior is charming. Clean wooden floors and tables. The owner appeared to be German or Austrian and he just seems to be enjoying life. They have a regular menu, or a special (28 soles, which is like $10) that includes soup, a main course, and dessert. A steal.

I believe there´s also free Wi-Fi and there are definitely also magazine racks along the walls, so they invite you to linger and enjoy yourself. Highly recommend.

This meal was one of the best in Cusco, for it's simplicity.

At Altitude, it is best to eat light. The soups at Granja Heidi were delicious and flavourful. I had a side dishes of olives, which came with so many big marinated olives. For barely no extra money, my companion got a whole basket of fresh bread.

On our first day in Cusco, at Amaru Hostal, and breathless and lightheaded, we asked the front desk where we should go for lunch. She said to try Granja which was 2 doors down - so very easy to get to. We did. And we came back for more. The ambience is warm and owner Carlos taught us how to deal with the attitude. But forget all that! Carlos' cuisine was stunningly subtle with waves of enjoyable refined flavours. Every meal was good and every meal was one of our best in Peru.