Bring a large pot of salted water to a rolling boil, then add the pasta and cook until just al dente, about 8-10 minutes. Drain and set aside, reserving a cup of pasta water.
In a skillet, heat olive oil over medium heat. Add minced garlic and diced onions, sauté until fragrant and translucent, about 2 minutes, filling the kitchen with a savory aroma.
Stir in the tomato sauce and a splash of reserved pasta water. Let it simmer gently until the sauce thickens slightly, about 5 minutes, bubbling softly and turning a vibrant red.
Use a slotted spoon to carefully form two large mozzarella balls into 'eyeballs' and nestle them into the sauce. Gently press in black olives or cherry tomatoes as pupils, creating spooky eyes.
Add the cooked pasta into the skillet and toss everything together to coat evenly with the sauce. Heat through for another 2-3 minutes, ensuring the pasta is hot and flavorful.
Finish by sprinkling chopped herbs and chili flakes over the top for a burst of color and a hint of heat. Arrange the eyeballs and pupils creatively for maximum spooky effect.
Serve immediately, showcasing the playful eyeballs and vibrant sauce—perfect for a fun Halloween dinner that’s as tasty as it is amusing.