Susan's never met a pasta salad that she really liked. It should be something that's easy to like; macaroni, chopped up stuff and sauce, but the proper combination has always been elusive.

Cousin Caroline hosted a little get together at her house a few weeks ago and when Susan saw the pasta salad she thought ho-hum but dumped some on a plate and ate it anyway.
Strangely, she liked it.
When Susan replicated it at home fifty percent of her kids liked it too. She can further report that leaving it in the fridge for almost a week had no ill effect on either the flavor or consistency.

For day four Susan is presenting COUSIN CAROLINE'S PESTO PASTA SALAD:

6 ounces jarred pesto + 1 cup mayo whisked together
pasta of your choosing
14 ounces drained & quartered artichoke hearts, in water or marinated, whatever
8 or 9 sundried tomatoes, chopped
1 cup frozen peas, not frozen is also an option
sliced black olives
chicken, cubed or shredded

Dance this mess around then buon appetito.