01 - Boil a large pot of salted water. Add tri-color rotini pasta and cook until al dente according to package directions. Drain and rinse with cold water.
02 - In a large mixing bowl, whisk together vanilla Greek yogurt, sour cream, honey, lemon juice, and vanilla extract until smooth and emulsified.
03 - Add the cooled pasta to the bowl with the dressing. Gently fold in the halved cotton candy grapes, sliced strawberries, pineapple chunks, and mini marshmallows.
04 - Toss the salad gently to ensure all components are evenly coated with the creamy dressing.
05 - Transfer the pasta salad to a serving bowl. Garnish with rainbow sprinkles and fresh mint leaves, if desired.
06 - Refrigerate for at least 20 minutes before serving to allow flavors to meld.