BLESS THIS MESS
Mix mayonnaise and Dijon mustard in a small bowl.
Spread the mixture on each bread slice.
Assemble sandwiches: cheese, ham, turkey, more cheese, and another bread slice (mayo side down) to create two sandwiches.
Whisk eggs and milk in a bowl. Dip sandwiches in the mixture.
Melt butter in a skillet, cook sandwiches for 2 minutes on each side until golden, and serve immediately.