Beat egg in a small bowl with 1 teaspoon water to thin it out a little.
Carefully break matzos into several large pieces so that it all fits nicely on one cookie sheet, then brush each piece with egg wash.
Sprinkle matzos evenly with everything but the bagel seasoning, then bake at 350 degrees for 8-9 minutes or until they smell great and the egg has dried.
Let cool a bit, then break into pieces and enjoy!
Notes
You’ll end up with plenty of extra egg, if you want to double this or make a second batch. You can pick up everything but the bagel seasoning at Trader Joe’s, some Costco stores, or online.