I ate ~600g-800g of Creamy Chicken & Mushroom pasta tonight. It's amazing how suddenly it went from "This tastes awesome" to "No more. Please." It happened around the 60% mark.
At around 75%, I had to take a break for a minute or two. Stomach raised the white flag. Brain, wanting to finish it all however, lied to Stomach, and told it that every bite tasted great and to keep eating. It was surprisingly effective for a short while. Soon enough, Stomach learned of the truth, and threatened to decorate the car if any more food goes down. Brain, being the logical one, gives up on finishing the tray.
It still pains me to waste food, but since it'll taste so bad as it goes down, anything that would have been eaten might as well be thrown out. At least it'll save you the health side effects.