M: making quesadillas and wondering, in terms of results, is it generally thought to be better to chop up steak beforehand or cook it and then chop it? It's a flank steak, and I was just gonna put some salt on it because family generally tends towards simple flavors.

G: TL;DR:
For quesadillas with flank steak and simple seasoning, cook it first, then chop it. You’ll get better texture, less moisture loss, and cleaner beef flavor.


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Method (minimalist):

  1. Salt the steak 15–45 min ahead (or right before if time’s tight).
  2. Very hot pan, neutral oil.
  3. Sear hard, ~3–4 min per side depending on thickness.
  4. Rest 5–10 min.
  5. Slice thin against the grain, then rough-chop if you want smaller quesadilla-friendly bits.
  6. Add to quesadillas just long enough to heat through and melt cheese.

When chopping first does make sense

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If you did this with just salt, you’d need extreme heat and very short cook time to avoid dryness.


Middle-ground option (worth mentioning)

Cook the flank whole → slice against the grain → quick second sear of the sliced meat in the pan (30–60 seconds).
This gives you both tenderness and a bit of extra browning without drying it out.


Bottom line

For flank steak + salt + quesadillas + family-friendly simplicity:
Cook whole, rest, slice against the grain, then chop as needed.