Preheat your oven to 200°C (400°F) and line a baking sheet with parchment paper. Unroll the crescent dough and press it into a flat sheet, smoothing out the creases with your hands or a rolling pin.
Spread a thin layer of tomato sauce evenly over the dough, leaving a small border around the edges. This adds flavor without making the crust soggy.
Use a sharp knife or pizza cutter to slice the dough into strips about 1 inch wide, creating bandage-like strips for your mummies.
Lay the strips on the prepared baking sheet, leaving space between them for the mummy bodies. Bake for 8-10 minutes until the edges are golden and flaky, filling your kitchen with a toasty aroma.
Remove the baking sheet from the oven, and brush the strips with the beaten egg to give them a shiny, golden finish. Let them cool slightly so they’re easy to handle.
Sprinkle shredded cheese over the strips, creating a patchwork of 'bandages' that will melt and hold everything together. Use a small spoon or piping bag for precise placement.
Press tiny black olive slices gently into the cheese to create adorable eyes, positioning them where the mummies' faces would be. Return the tray to the oven for another 2-3 minutes until the cheese is bubbly and slightly browned.
Once out of the oven, let the mummies sit for a few minutes to set. Arrange them on a serving platter, adding chopped herbs or chili flakes for extra flair if desired. Serve warm or at room temperature for a fun, spooky snack.