In a large bowl, combine the pasta with all the pasta salad ingredients. (Stir in the dressing last). You can serve right away, but I always love prepping this in advance, so the pasta salad has some time to sit in the fridge to really soak up all the flavors.
2 cups cherry tomatoes, halved (I LOVE cherry tomatoes so I include 2 cups, you may want less), 1 cup summer sausage, julienned, 1 cup fresh mozzarella pearls, 1/2 cup Italian green olives (Castelvetrano), 1/2 cup red onion, finely diced, 1/2 cup sliced peperoncini (optional), 1 cup Italian dressing, or added to taste