Step 1: Cook the Pasta. Bring a large pot of salted water to a rolling boil and add the rotini pasta. Cook according to package instructions until al dente, usually about 8–10 minutes. Once cooked, drain the pasta in a colander and rinse under cold water to stop the cooking process. Allow it to cool completely before moving to the next step.

Step 2: Make the Vinaigrette. In a small bowl, combine olive oil, red wine vinegar, minced garlic, Italian seasoning, red pepper flakes, salt, and black pepper. Whisk until the ingredients are well blended and the dressing is smooth. For a more intense flavor, cover and chill the vinaigrette in the refrigerator while you prepare the rest of the salad ingredients.

Step 3: Prepare Salad Ingredients. While the pasta is cooling and dressing is chilling, take the time to chop the salami and pepperoni into bite-sized pieces. Halve the cherry tomatoes, slice the olives, red onion, and fresh basil. Set these vibrant ingredients aside; they will add rich flavor and color to your Italian Antipasto Pasta Salad.

Step 4: Mix the Salad. In a large mixing bowl, combine the cooled rotini pasta with the chopped salami, pepperoni, cherry tomatoes, olives, artichoke hearts, sliced pepperoncini, mozzarella pearls, and red onion. Gently toss these ingredients together, ensuring the pasta is evenly distributed with all the flavorful additions.

Step 5: Toss with Vinaigrette and Chill. Pour the chilled vinaigrette over the pasta salad and gently toss everything together. Make sure all ingredients are well-coated with the zesty dressing. Cover the bowl with plastic wrap or transfer the salad to an airtight container, and chill in the refrigerator for at least 30 minutes to 1 hour before serving. This allows the flavors to meld beautifully.

Step 6: Serve and Garnish. After chilling, take the Italian Antipasto Pasta Salad out of the refrigerator. Give it a quick toss before transferring it to a serving bowl. For an extra touch, garnish with fresh basil leaves and a sprinkle of shredded Parmesan cheese. Serve chilled, and enjoy the delightful blend of flavors at your gathering!