To start, heat your oven to 300°. Then, add the chopped bread to a food processor and pulse until ground to your preferred consistency. (finer texture for battering, coarser texture for use as a topping).
Lay the breadcrumbs out onto a large sheet pan and sprinkle with the za'atar, sea salt, and olive oil. Toss until well combined.
Then, add to the oven and toast for 5-10 minutes. Check often, stale bread will toast faster than fresh bread. They should be very crunchy.
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Notes
This recipe is a great way to use up any stale bread you may have laying around.