Paku pakis is stir-fried fiddlehead fern shoots, called pucuk paku, and if you have never tried it, think of it like kangkung's wilder Bornean cousin. Slightly more tender, earthy, with that classic belacan smell that will make the whole table hungry. At 180 calories a plate it is genuinely one of the smarter veg dishes you can order at a warung. The fern shoots themselves only clock in at 44 calories for 130g, which is almost embarrassingly low. Worth noting though, these numbers assume a hawker goreng belacan that includes shrimp paste with some dried shrimp content. Plain blanched paku pakis without belacan will have noticeably less protein. Take the figures as a solid guide, not a lab result.
What actually moves the maths is the oil and whether santan gets involved. A hawker stall goreng will use roughly 1.5 tbsp of oil (14g, about 90 calories) and that alone accounts for half the plate total. Go kerabu style, blanched with lime and belacan and no frying, and the whole thing drops to around 90 calories. Order masak lemak and coconut milk pushes it up to 260 calories, and if there are prawns or ikan bilis in there too you are looking at 310 calories. Portion size matters too, warung plates vary, so if they pile it on generously add another 20 to 30 calories to whatever version you order.