Don't throw away the crusts or any stale bread you may have, turn them into breadcrumbs instead.
Grind your dried bread scraps in a food processor (better) or a blender. Add dried herbs to your taste.
Grind to your preferred coarseness and put in a sealed jar. For guaranteed freshness, keep in refrigerator.
If you don’t have a blender, place broken-up dried bread pieces in a sealed plastic bag and bang them with a roller. Then roll them until the desired texture is obtained.