Picked up some take out from the Waltham Mulan last night. First time there, and decided to try the Watercress with "Taiwan Sauce". Very interesting dish...had tiny little fish (?small dried anchovies?). But the thing that baffled me were these small, pea-sized morsels with a very hard pit in the center! They were tan colored and had a sweet/salty vibe going. Does anyone know what these were? They were yummy, but I almost broke a tooth biting down on a mouthful of the dish, not knowing what they were and that they had this diamond-strength pit in the center!