This is a simple salad for when time is scarce but flavor aspirations are high. Sliced ripe plums and milky mozzarella produce a fresh, cooling and minimalist dish, perfect for hot summer evenings. When assembling salads that have few major ingredients, like this one, consider layering dressing elements to create more dimension. For instance, the lime juice and red wine vinegar add multiple bright notes to the spicy serrano dressing. Similarly, …