Ambuyat is the national dish of Brunei and a proper staple in Sabah and Sarawak too. If you have never had it, imagine sago starch cooked into a thick, sticky, translucent gel, kind of like very dense wallpaper paste but weirdly satisfying. You twirl a big blob of it around a bamboo fork called chandas, dip it into a sour, spicy cacah sauce made from dried shrimp, belacan, chili and lime, and swallow the whole thing without chewing. Seriously, you do not chew ambuyat. At 245 calories a serving it sounds diet-friendly, but be honest with yourself: the plain ambuyat itself is just 210 calories of pure sago carbs with 3g protein. It will fill you up for maybe an hour before your body figures out there is nothing substantial in there. These numbers are a ballpark estimate by the way, hard nutritional data for ambuyat is basically non-existent, so treat the figures as a reasonable guide rather than gospel.
What actually changes the maths is what you eat alongside it. The plain ambuyat set at 245 calories is fine as a base, but nobody eats ambuyat alone for a full meal. Add one piece of ikan goreng, around 80g of fried fish, and that is roughly 180 calories extra. Add a plate of sayur tumis and you are looking at another 60 calories. The full set lands around 470 calories total, which is actually a solid, filling meal at a reasonable calorie count. The tempoyak cacah version adds about 40 calories from fermented durian fat and carbs and pushes you to 280 calories for the ambuyat portion alone. The real trap is not the ambuyat itself, it is ordering two servings because the first one felt light.