Place bread cubes in a food processor and chop for about 20-30 seconds. Stop when you have a crumb size slightly larger than your desired consistency, since the bread crumbs will shrink a bit after baking.
Spread the crumbs on an ungreased standard baking sheet and bake for 5 minutes.
Stir the crumbs around, bake more 5 minutes, stir again.
Bake for a final 5 minutes, then remove pan from the oven. Allow the crumbs to cool on the pan for 10 minutes.
Combine the cooled bread crumbs and seasonings in a medium mixing bowl and gently stir until coated.
Allow to cool and dry completely before storing.
Notes
Storage - Keep in an airtight container, in a cool, dry area such as a pantry, for up to 2 weeks (though they may last even longer!) Bread - Regular white sandwich bread works great, but any white bread, including gluten-free, can be used. Because moisture levels vary by brand and type, the exact yield from 4 cups of bread may vary slightly.