Cook the rotini pasta according to package directions until just barely al dente—about 11 minutes. I undercook it by one minute because the salad dressing will soften it slightly. Drain and spread it on a sheet pan to cool while you prep vegetables; this stops the cooking process immediately.

Cut cherry tomatoes in half and place them in a colander with a pinch of salt. Let them drain for 5 minutes—this removes excess water that would make your summer pasta salad family recipe watery by tomorrow. I know it feels like an extra step, but it's the difference between something soggy and something that stays fresh.

Dice the cucumber, red bell pepper, red onion, and combine them in a large mixing bowl. The red onion sharpness gets mellowed by sitting with the lemon juice, so don't shy away from the full 1/4 cup. Chop the parsley fresh right now because dried parsley looks like seasoning dust here.

In a small bowl, whisk together the olive oil, lemon juice, and dried oregano until the oregano releases its oils and smells incredible. Taste it straight—that's the flavor profile your entire crowd summer side family will remember. Add a pinch of salt and black pepper to your dressing because vegetables need seasoning before the pasta joins them.

Combine the cooled pasta, vegetables, chicken, olives, and feta in one large bowl. Pour the dressing over everything and toss gently but thoroughly for about one full minute. The pasta absorbs the dressing fast, so you want even coverage on every piece.

Let the easy pasta salad kids salad sit at room temperature for 15 minutes before serving. This resting time lets the flavors marry together instead of tasting like separate ingredients. If you're making this ahead, refrigerate it and add a fresh squeeze of lemon juice right before serving because acidity fades overnight.