Begin by bringing a large pot of salted water to a rolling boil over high heat. Add the spaghetti and cook it for 8 to 10 minutes, stirring occasionally, until al dente. Use a colander to drain the spaghetti.

Immediately transfer the drained spaghetti to a bowl and rinse it under cold running water for about 1 to 2 minutes. Allow it to drain thoroughly.

Wash and chop your fresh ingredients. Halve the cherry tomatoes, dice the cucumber and both bell peppers, and finely chop the red onion. If using black olives, slice them as well.

Add the cooled spaghetti to the bowl containing the chopped vegetables. Gently stir the ingredients together to combine.

Pour your Italian dressing over the spaghetti and vegetables. Toss everything vigorously for about 1 minute until all ingredients are coated.

Taste the salad and season with salt and black pepper if needed. Optionally, sprinkle with grated Parmesan cheese.

Cover the salad with plastic wrap and refrigerate for at least one hour to meld the flavors.