Ajiaco de Ollocus

Ollocus are potatoes grown in Latin America that are tuber-shaped, small and yellow, and are sometimes flecked with red. Their inclusion in this aromatic brew may be largely aesthetic but also necessary because they don’t break up when cooked. A small, waxy potato such as the knobbly Pink Fir Apple is a good substitute. At any rate, use two distinct varieties of potatoes here, as near a yellow and a white as is possible.