1/2teaspooneach: basil, oregano, thymeor use 1½ teaspoons of just one herb
Break up the pieces of bread if you haven't already and toss them into the food processor bowl. You don't even have to defrost the bread if it's frozen before whirring it up most of the time (the exception is a hard crust from artisan bread).
Whir the pieces until finely and evenly chopped.
Store in a glass mason jar or other container in the fridge for a month or in the freezer for 6 months or more.
*Keep a container in the freezer to add any of these bread products to, making into crumbs when you have enough:
Any stale pieces of bread left in packages.
Baking mistakes like rolls, toast, muffins.
The bread ends no one in the family really likes.
Opened crackers that have been in the cupboard who knows how long. Stale crackers are fine in crumbs.
Also: You can make crumbs from a cereal you tried but didn't like or has gone stale and use them in fruit crisp toppings - just make sure to package & label them separately.