Go old school. This is home-style criollo (spicy Peruvian fare with Spanish and African influences) food at its best. Isolina doesn't shy away from tripe and kidneys, but also offers loving preparations of succulent ribs, causa escabechada (whipped potato dishes with marinated onions) and vibrant green salads on the handwritten menu. Family-sized portions come in old-fashioned tins, but you could make a lighter meal of starters such as marinated clams or ceviche.
You may not havee room for dessert, but it sure looks good. The pisco sours are recommended.