This salad is infinitely variable. You can use pretty much any chopped vegetables that you like, in any amount that you like. And the recipe doubles or triples very easily to feed a larger group.
Serving suggestions: Add diced firm tofu, chopped pepperoni, sautéed shrimp, or fully cooked smoked sausage for some protein.
Dressing Variations: Mix 1/4 cup of bottled raspberry-chipotle sauce with 2 tablespoons of balsamic vinegar; add salt to taste. Or use your favorite bottled vinaigrette.
In a small bowl, whisk the additional 1 tablespoon of olive oil with the vinegar, Italian seasoning, sugar, salt, cayenne pepper, and nutmeg.
Pour the dressing over the pasta salad and toss it to coat.