Toast the bread slices in a toaster until they turn golden and firm.

Cut the avocados in half, remove the pits, and scoop the flesh into a mixing bowl.

Add the lime juice, salt, and black pepper to the bowl, then mash everything together until mostly smooth.

Spread the avocado mixture evenly across each toasted bread slice.

Cut each slice into four small rectangles to make bite-sized pieces.

Slice the black olives in half and cut small wedges from the cherry tomatoes.

Place two olive halves on each bite as eyes and add a tomato wedge as a mouth to form the Frankenstein faces.