Grease a 9 x 13 baking dish with butter or nonstick spray
Cut bread slices into squares, and add a layer on the bottom of the prepared baking dish
Top bread layer with half of the ham and 1 cup of cheese. Top with remaining sliced bread and remaining ham and cheese
In a large mixing bowl, add the eggs, milk, cream, mustard and spices. Whisk together until very well blended
pour egg mixture evenly over strata, pressing down with spoon or fork so that it doesn't overflow. Bread will start to absorb the liquid
Cover with a layer of plastic wrap and a layer of aluminum foil, and refrigerate 8 hours or overnight
In the morning, preheat oven to 350°, remove baking dish from refrigerator, and remove plastic wrap and foil
Place strata in middle of preheated oven, and bake for 45 to 60 minutes or until top is golden brown and knife inserted into center comes out clean
Allow to cool for a few minutes before slicing and serving