This happens to all of us – be it because we misread the recipe and threw in a tablespoon of sage when it said a teaspoon of sage, or because we were bravely experimenting with new tastes and suddenly noticed something amiss. The question also covers cases where the food is normally seasoned for the average person, but an eater hates a certain aroma and perceives it as strongly unpleasant, and cases where the unwanted aroma does not come from seasoning, but e.g. from burning the food.
In the end, we have a batch of smelly food and wonder where the Undo button is. How do we save it and make it tasty again?