On my visit to La Plaza in the City of Knowledge, I chose to lunch at Pan y Canela, a restuarant/bakery that offers a large choice of breads, sweets, sandwiches, soups and coffees. I had a turkey sandwich with fries and a cappuccino. The sandwich and fries were good but my favorite was the cappuccino. It was awesome. This place is usually very crowded but the service is fast and efficient.
http://www.degustapanama.com/restaurante/pan-y-canela_218.html