Rinse lettuce well, cut into bite size pieces, and spin if you have a lettuce spinner or pat dry with paper towels. Try to get lettuce as dry as possible so dressing is not diluted. If you have a salad spinner it is best. Blend dressing ingredients together for 1-2 minutes, drizzling olive oil at end a little at a time. Toss romaine lettuce with desired amount of dressing and walnuts if you choose to use them. There will be dressing left over. It saves very well in your refrigerator for 2 weeks. Serves 4.