Place a large pot of water over high heat and bring to a boil. Add a large spoonful of salt to the water. Then stir in the dried pasta. Cook according to package instructions, usually 6-8 minutes to al dente. Drain the pasta, and rinse with cold water in a colander. Shake off the excess water and place the pasta in a large salad bowl.
While the pasta is boiling, whisk all the ingredients of the vinaigrette in a small bowl. Set aside. Then chop all the salad ingredients.
Pour the tomatoes, sliced hard salami, chopped piquillo peppers, red onion, parsley, mozzarella ball and olives over the pasta. Pour the vinaigrette over the top and toss well to coat. Taste, then season with salt and pepper as needed.
The Best Italian Pasta Salad Recipe tastes best, when it's had time to sit, so the flavors mingle together. If you can, make it several hours (or even a day) ahead.