The sublime combination of sweet fruit and salty blue cheese means you can keep the rest of the salad simple. White balsamic vinegar gives the dressing a light flavor.
1. In a large bowl, whisk together oil, vinegar, and salt. Add lettuces and blueberries and toss to coat.
2. Divide mixture among 4 salad plates. Sprinkle with pine nuts and gorgonzola, and grind pepper over each salad.