Breezy, that's what I've always called, "Grab-bag cooking". You get something, not totally sure what it is/was, and have to plan out a meal, often on-the-fly. I've done that, at home and work, for years.
Case in point: two days ago. I was prepping the entrees for Friday night. I had to do a "beef roulade". Normally, when that one is on the menu, they stuff it with cornbread stuffing. However, I already had a stuffed pork loin with bread stuffing prepped up for that same meal. One of the Sous's and the Exec. Chef were trying to figure out what to do, and I mentioned, "Why not a Florentine-style stuffing?"
Needless to say, they told me to run with it. It was cooked and served last night. One of the cooks that tasted it said it tasted good. I'll have to wait until Monday for the official word.