With strawberry season quickly approaching, I decided to create a salad that uses plenty of them. After all, strawberries are most luscious, juicy, and flavorful when in season. In addition to strawberries, this salad is loaded with blueberries, mango, and avocado. A sprinkle of crunchy walnuts and a drizzle of cayenne lemon vinaigrette, over peppery arugula, is a warm day's companion and a healthy salad that's perfectly balanced.