Prepare the fruits by dicing the watermelon and mango, slicing the strawberries, and dicing the cucumber. Place all the fruits in a large mixing bowl.
In a small bowl, whisk together the lime juice, honey, chili powder, and a pinch of salt to create the chili lime vinaigrette.
Pour the vinaigrette over the prepared fruits, and gently toss everything together until the fruits are well coated with the dressing.
Let the salad sit for a few minutes to allow the flavors to meld.
Serve the salad in individual bowls or on a platter, garnished with fresh mint leaves if desired.
You can customize the salad by adding other fruits such as pineapple or kiwi if desired.
For a spicier kick, increase the amount of chili powder according to your taste preference.
This salad is best served immediately, but can be stored in the refrigerator for up to a day.