Cut each muffin in half to make 4 rounds pizza bases. Place them cut-side up on a baking tray.

Spread a thin layer of tomato puree over the cut sides of the muffins.

Using a round cutter that is roughly the same size as the muffin, cut 4 circles from the mozzarella cheese slices. Cut each circle into approx. six strips.

Arrange a set of cheese strips on the top of each muffin, layering them at different angles to create a mummy effect.

Slice the black olives into rings.

Arrange two black olive rings on the top of each pizza for eyes.

Bake in the oven for 5-10 minutes until the cheese is just melted.

Leave to cool for a few minutes before serving, or cool completely and pack in a lunch box.