Acidic Emulsion

Vincent sighed and looked down at his salad.  It had been drowned in at least three shakes too many of bitter dressing.  With no further lettuce, spinach or tomatoes to redress the balance, he plunged in to his lunch, his face contorting as the vile mix of vinegar and cheap spice beat seven shades out of his taste buds.  Once finished he put the dish to one side and began crying.  He'd forgotten to buy pudding.