Spread the mustard on each half of bread. Layer with the cheese and meats on one half, then top with the second half of the bread. Press lightly together. In a shallow mixing bowl, whisk the eggs and cream together. Season with salt and pepper. Heat 2 tablespoons of the butter in a nonstick skillet over medium heat. Dip 2 of the sandwiches into the egg mixture, coating evenly. Fry in the butter until golden brown, 2 to 3 minutes on each side. Remove from the pan and slice horizontally. Serve warm with a sprinkle of confectioners' sugar. Repeat the process with the remaining butter and sandwiches.
Yield: 4 servings