Preheat oven to 375° and line a large baking sheet with parchment paper.
Cut crescent dough lengthwise into thin strips.
Cut Edam into thin slices.
Place each kielbasa on top of a piece of cheese, then wrap it with crescent dough to look like bandages. (You’ll need about 4 pieces of crescent dough per hot dog.)
Place on the prepared baking sheet and brush with melted butter.
Bake until crescent dough is golden and cooked through, about 12 to 15 minutes.
Using a toothpick, dot mustard onto each mummy to create eyes.