I made fried rice a few days ago. It was good. I had leftovers the next day and it was better. I had leftover again a day after and it was even better (spices and flavours developed and it became more savoury). Presumably this will continue until it spoils, hence the title.
Confession. I thought of this while in the bath, not the shower.
And most meat dishes, egg dishes, pretty much anything containing dairy, most raw/cooked produce and produce-containing dishes, opened canned goods, etc, etc. Way more than just "starchy foods"