Preheat oven to 375 degrees. Spread 1 TBS butter evenly throughout a 9 x 13 deep casserole dish.
Place 5 pieces of white bread on bottom of prepared baking dish in one layer. The 5th piece will be cut in half to fit.
Spread a tiny bit of stone ground mustard evenly on each piece of bread in casserole dish. Loosely lay 1/2 of the ham across the bread in casserole dish. Top with 3 oz of shredded cheese.
Place 4 pieces of bread on top of the cheese. Spread a tiny bit of jelly on each piece of bread evenly. Loosely lay rest of the ham across the bread. Top with 3 oz of shredded cheese. Top with 5 pieces of bread. Sprinkle 3 oz shredded cheese on bread.
In a large mixing bowl whisk eggs, milk, and seasonings (salt, black pepper, and nutmeg) until frothy and combined.
Pour egg mixture over the top layer of cheese covered bread and in between the bread to allow to soak to middle and bottom layers. Top with additional 3 oz shredded cheese.
Place in preheated oven uncovered for 35-40 minutes until the cheese is melted and golden. Cut into squares. Serve it up with powdered sugar and a side of jam. Enjoy.
