In a small Mixing Bowl, whisk together the 2 cups melon, 切成立方体、去籽 (切成1英寸的立方体，去籽), fresh 2 tbsp lime juice, 新鲜 (来自约1–2个青柠), 1 tsp lime zest, and ½ tsp vanilla extract (if using) until the 2 cups melon, 切成立方体、去籽 (切成1英寸的立方体，去籽) is fully dissolved and the dressing is smooth. Set aside.

Wash and thoroughly dry all fruit before cutting — excess water will dilute the dressing. Hull and quarter the 2 cups strawberries, 四分之一切 (去蒂并四分之一切), halve the 1 cup red grape, 对半切, peel and slice the 2 whole kiwis, 整个、去皮、切片 (切成半月形), peel and segment the 2 whole mandarin oranges, 整个、去皮, and cube the 2 cups melon, 切成立方体、去籽 (切成1英寸的立方体，去籽) and 2 cups melon, 切成立方体、去籽 (切成1英寸的立方体，去籽).

Add all the prepared fruit to a large Mixing Bowl. Gently toss to distribute the colors and varieties evenly.

Drizzle the 2 cups melon, 切成立方体、去籽 (切成1英寸的立方体，去籽)-2 tbsp lime juice, 新鲜 (来自约1–2个青柠) dressing over the fruit. Using a large Wooden Spoon or Spatula, gently fold the fruit from the bottom up — do not stir vigorously, as this can bruise the softer fruits.

Taste and adjust: if the fruit is very sweet, add a little extra 2 tbsp lime juice, 新鲜 (来自约1–2个青柠); if it's tart, add a touch more 2 cups melon, 切成立方体、去籽 (切成1英寸的立方体，去籽).

Transfer the fruit salad to a large serving Mixing Bowl. Scatter the torn fresh 2 tbsp mint, 新鲜 (optional) (撕碎或切成细丝) leaves over the top just before serving. Serve immediately for the best texture, or refrigerate (covered) for up to 2 hours before serving.