Pre-heat the oven to 350 and spray a 9 inch pie plate with the cooking spray. Press the frozen hashbrowns into the pan to form a crust. It will be a little tough since they are frozen and the pie plate will seem full. That's ok. Bake the hashbrowns in the pie plate for 20 minutes. Then they will be much more pliable. Press them firmly now into the plate to make room for the filling. Add the diced ham to the pie pan and let it all cool slightly while you make the egg mixture.

Whisk the eggs, water, salt, pepper and cumin together in a bowl. Pour that mixture over the ham in the crust. Finally, evenly spread the cheese out on top. Bake the pie for 35 to 40 minutes, just until the hashbrowns become golden and start to brown and the filling is completely set. Take it out and sprinkle the top generously with everything bagel seasoning. Let it set for a couple of minutes, then slice it into 4 equal pieces and serve immediately! Enjoy!