Preheat the oven: Preheat your oven to 400°F and line a baking sheet with parchment paper.
Toast the sourdough: Place the sourdough slices on the baking sheet and toast in the oven for 4–5 minutes, until lightly golden and crispy. Remove from the oven.
Season the cottage cheese: In a small bowl, combine the cottage cheese, olive oil, Italian seasoning, red pepper flakes, and freshly chopped basil. Mix until well combined.
Assemble the pizza toasts: Spread an even layer of seasoned cottage cheese over each piece of toasted sourdough, followed by a thin layer of pizza sauce.
Create the zombie faces: Arrange the strips of mozzarella or cheddar cheese across the pizza sauce in overlapping, crisscross patterns to resemble zombie bandages. Leave two small openings near the top of each toast for the eyes.
Add the olive eyes: Place two slices of Castelvetrano olives on each toast in the openings between the cheese strips to create the zombie eyes.
Bake: Return the toasts to the oven and bake for 4–6 minutes, until the cheese is softened and slightly melted but still holds its shape.
Serve: Remove from the oven and serve warm.