Grease a 9x13 pan.

Place bread in the bottom of the pan, pressing it in to flatten it. You may need to cut slices to fill in gaps/holes.

In a bowl, toss 2 cups of cheese, the broccoli, and ham together and layer over the pressed bread in the pan.

Cover the filling with the remaining slices of bread, again cutting slices to fill in any gaps or holes. Press down.

In the same bowl as the tossed filling, whisk together the eggs, milk, mustard, and seasonings.

Pour over the bread as evenly as possible.

Using a spoon, press the top of the strata down to makes sure it becomes saturated with the egg/milk mixture.

Cover and chill for at least 3 hours to overnight.

When ready to bake, pre-heat the oven to 350° and remove the strata from the refrigerator and allow to warm up to room temp.

Remove the cover and bake uncovered for 40 minutes, but begin checking at 35, and it could cook as long as an hour, depending on your oven.

Once the liquid has been mostly absorbed, the strata is almost firm, and the top is nearing golden brown, sprinkle the remaining one cup of cheese over the top and continue to bake until the cheese has melted over the top and the strata is firm.

Allow to rest for 10 minutes before slicing and serving.