I've been to Camp de futbol several times for breakfast and lunch. It's very cheap and the food is ok. The breakfast is always good (sandwiches with bacon and eggs). The lunch can be good and it can be mediocre, depending of which food you order. 3 dishes with drinks is about 11 EUR.
We usually go there since we discovered so many snacks for breakfast. a deal more than excellent, good raw material and very good cook with the added to find you inside the field of fc olot and the natural environment of the garrotxa of background. 11!