1. Combine lettuce, nectarines, onion, goat cheese and almonds in a large salad bowl.
2. In a small bowl, combine vinegar and mustard. Season with salt and pepper; whisk until salt is dissolved. Slowly add both oils, whisking constantly, until blended and thickened.
3. Just before serving, pour dressing on salad; toss well.
Switch fruits. Don't care for nectarines or can't find good ones? This salad works just as well if you substitute peaches or plums. Or try it with sliced strawberries.