Jan's Ham and Egg Breakfast Strata

Grease a 9x12-inch baking pan with butter. Combine Cheddar cheese and Swiss cheese in a bowl.

Remove and discard bread crusts. Arrange 1/2 the bread on the bottom of the pan. Top evenly with 1/2 the ham and then 1/2 the cheese mixture. Repeat layers of bread ham and cheese mixture.

Combine eggs milk onion salt and dry mustard in a bowl. Pour over layers in the baking pan cover and refrigerate strata 8 hours to overnight.

The next morning preheat the oven to 375 degrees F (190 degrees C). Remove strata from the refrigerator and uncover.

Combine corn flakes and melted butter in a bowl and pour evenly over strata.

Bake in the preheated oven until set 50 to 60 minutes. Remove from the oven and let strata sit for 10 minutes before serving.