Set your oven to 200°C (390°F) to prepare for baking later.
Bring a large pot of salted water to a rolling boil, then add your pasta and cook until al dente, about 8 minutes. Drain and set aside.
While the pasta cooks, shred the cheddar cheese and chop the red bell pepper into small pieces. Slice the black olives into thin rounds.
In a mixing bowl, toss the cooked pasta with the shredded cheese, chopped red bell pepper, sliced olives, and cooked chicken or sausage, ensuring everything is evenly coated.
Transfer the mixture onto a baking sheet, spreading it out evenly. Use spooky pasta cutters or shape the pasta by hand into ghostly or pumpkin shapes if desired.
Bake in the preheated oven for about 10-15 minutes, until the cheese is melted and bubbly, and the edges of the shapes start to crisp up for a spooky effect.
Remove from the oven and let it cool slightly. Use a piping bag or a plastic bag with a corner cut to pipe additional melted cheese or sauce if you want to add more spooky details.
Decorate your spooky pasta with extra sliced olives for eyes or other fun accents to bring your Halloween theme to life.
Serve your Halloween Pasta hot, with the cheesy, crispy edges and playful shapes making it a festive, fun meal perfect for celebrating the holiday.