We had dinner at Inka Grill. The location is excellent, right on the Plaza de Armes. The atmosphere was wonderful and the service excellent. We were pleasantly surprised at how low the prices were in relation to the food we ordered.
I had had a large lunch, so I had the Lyon-style onion soup (French onion soup). It was excellent, piping hot, with a wonderful topping of bread and cheese. The others in my party tried the pizza (Inka Grill special) and Lomita Saltada and pronounced both also excellent.
They had a neat table as you came into the restaraunt, with local produce and a really neat candle.