In English: the older the protein, the worse the pain. It's often associated with aged cheese and pickling, smoking or fermenting, but can be just as nasty in days old leftovers.
And herein lies the dilemma: how to love to cook and live to eat and not waste a ton of food? For this, the freezer is my friend. If I can't finish a dish within 24 hours, freezing the leftovers can buy another day.
Ironically, I also don't own a microwave, so have had to learn some 50s-era tricks. In this case, I made a classic one-pot chicken and rice, but used last week's frozen roast chicken.
First toast a cup of rice in hot olive oil until fragrant and glistening. Nestle the frozen chicken parts in the rice and add 1/2 cup of white wine for flavor. Then add 2 cups of water, a bit more than you'd use for rice alone. Bring to a boil and simmer for 45 minutes.
About 15 minutes in, add veggie of choice (or fruit--with winter coming to a close, I'm still cooking with apples and turnips).
Waste not, want not, and wait for Spring.
