Cassava boiled with garlic until it cracks open, then cut into batons and fried. The boiling is not optional: cassava fried from raw stays hard in the middle. Half an hour, and it serves four.
Boiling first is what separates this from a chip that comes out hard. Cassava is dense and starchy, and fried from raw the outside burns long before the middle cooks, which is the same reason patacones are fried twice. If you want them crisper, let the boiled cassava cool completely, even overnight in the fridge, before it goes into the oil. And never taste it raw: raw cassava contains compounds that release cyanide, which boiling removes completely. In Colombia these are served with ají, with suero costeño on the coast, or with plain tomato sauce.