Step 1: Cook the Spaghetti: Bring a large pot of salted water to a boil. Add the spaghetti and cook according to package directions until al dente. Drain the spaghetti and rinse under cold water to stop the cooking process. This prevents sticking and cools the pasta for the salad.
Step 2: Prepare the Vegetables: While the spaghetti is cooking, prepare the vegetables. Halve the cherry tomatoes, dice the green bell pepper, slice the black olives, and thinly slice the red onion.
Step 3: Combine Ingredients: In a large bowl, combine the cooked spaghetti, halved cherry tomatoes, diced green bell pepper, sliced black olives, and thinly sliced red onion.
Step 4: Add Dressing and Cheese: Pour the Italian dressing over the spaghetti and vegetables. If desired, add the grated Parmesan cheese.
Step 5: Toss to Combine: Gently toss all ingredients together until well combined and the spaghetti and vegetables are evenly coated with the dressing.
Step 6: Chill and Serve: Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to allow the flavors to meld. This chilling period is essential for the best taste. Before serving, sprinkle with chopped fresh parsley and season with salt and freshly ground black pepper to taste.
Optional tips: Substitute other vegetables, such as cucumber, carrots, or roasted red peppers. Add protein, such as grilled chicken or chickpeas. For a creamier salad, add a dollop of mayonnaise or Greek yogurt to the dressing. Use gluten-free pasta to make this recipe gluten-free.