✓ Prepare a vibrant fruit salad base with diced watermelon, halved navel orange segments (peel removed), and halved cherries in a large bowl. Arrange the larger fruit pieces at the bottom of the serving dish for structure.

✓ Gently fold about one-third cup sweetened whipped cream into approximately 7-8 oz instant pistachio pudding mix until smooth. Layer this mixture evenly over the fresh fruits as a middle layer if desired, or add it throughout for enhanced flavor diffusion.

✓ Crush about half of your mini marshmallows slightly in another small bowl while keeping some whole; gently fold these crushed and intact marshmallows into the fruit salad components just before serving to create textural contrast without making them soggy too quickly.

✓ If using, distribute chopped pistachios or walnuts/pecans throughout the assembled dessert for added crunch. For best results serve immediately after assembly.