In a small mixing bowl, combine ½ cup olive oil, ¼ cup apple cider vinegar, 2 teaspoons Italian seasoning, 1 teaspoon granulated sugar, 1 teaspoon garlic powder, ½ teaspoon salt, and ½ teaspoon black pepper to make the dressing. Set aside.
Combine the pasta and dressing in a large serving bowl. Then gently mix in the ½ medium red onion (sliced), 8 ounces cherry tomatoes (halved), 1 English cucumber (chopped), 4 ounces mozzarella pearls, 4 ounces salami slices (sliced), ½ cup kalamata olives, and ¼ cup chopped fresh parsley. Toss together until evenly combined and coated in dressing.