One of the must-order signature items at Mouth Restaurant are the irresistible salted egg yolk buns. With a crust that's soft like polo buns and inside containing salted egg molten, it totally screams of indulgence and decadence. Might be a tad expensive at $5.80 for 3 buns, it's totally worth it as you bite into one of them. Think of it as Tim Ho Wan's famous char siew buns with piping hot flowing salted egg.