Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.

Spoon 1 tablespoon of tomato sauce onto each slice of sandwich bread and place the slices on the baking sheet.

Cut the mozzarella into pieces and put a few pieces on each slice of bread.

Slice the hot dog into rounds and place a few rounds on each slice of bread. Add olives to taste.

Bake for about 10 minutes, or until the edges of the bread are golden brown.