I just had some of my mom’s leftover spaghetti, and I realized that it always has a slightly more bitter taste in the morning after being reheated. What causes this kind of reaction?

Question

It happens both when stored in pyrex or tupperware.
Ingredients aren’t anything unusual; onions, garlic, hamburger, tomato paste, etc.
Tastes sweeter when fresh off of the stove, but has a more bitter taste when reheated as leftovers.

In: 159

Answer 1

Sounds like you’re burning part of it in the microwave. Maybe add more moisture, and try stirring half way through, and maybe microwave it for less time. Also, make sure you put it away pretty quickly. If the sauce is sitting out in the air to cool, than can change the flavor. Once the temp drops below 160, you have half an hour to get it in the fridge before bacteria starts to breed. And once it’s cool, if you leave it out and uncovered, the air can also change the flavor.