Preparation Stir lime juice, fish sauce, sugar, and 1 Tbsp. water in a large bowl until sugar is dissolved. Lightly crush 2 basil sprigs by scrunching up in your hand and add to dressing along with watermelon; toss gently until coated. Transfer watermelon salad to a platter, leaving basil sprigs behind. Top with peanuts and basil leaves, drizzle with oil, and season with salt.
Preparation Stir lime juice, fish sauce, sugar, and 1 Tbsp. water in a large bowl until sugar is dissolved. Lightly crush 2 basil sprigs by scrunching up in your hand and add to dressing along with watermelon; toss gently until coated. Transfer watermelon salad to a platter, leaving basil sprigs behind. Top with peanuts and basil leaves, drizzle with oil, and season with salt.