Season the cod strips with salt, pepper and other spices of your liking. Season the flour, egg, and breadcrumbs as well.*
Dip and pat each cod strip first in the flour, then dip in the egg + mustard mixture, and finally in the breadcrumbs, using your fingers to press the breadcrumbs in firmly to help them stick.
Lay each dipped fish stick on a foil lined baking sheet or baking rack, and spray with cooking oil spray (or brush with olive oil). Cooking spray or brushed oil with help the outers crisp up more in an oven, without frying.
Bake ~12 minutes at 450 degrees Fahrenheit until done, flipping once half way through cooking. Check a fish stick center for doneness.