Hearts of palm grow commercially in Costa Rica's northern lowlands, and arroz con palmito is the creamy, cheesy rice bake that turns up at family birthdays, first communions and Christmas buffets across the country. Cooked rice is folded with sliced palmito, sweet corn and a light white sauce, then baked under melted cheese until bubbling. Overcooking the rice at the start is the usual mistake; it keeps softening in the oven, so cook it just tender. Costa Rica's Turrialba cheese and most mozzarella use animal rennet, so choose a vegetarian melting cheese if needed. Chef's tip: slice the palm hearts into coins rather than chopping them; they keep their delicate, artichoke-like bite.