The top layers of chopped vegetables keep the dressing from soaking and wilting the bottom layer of lettuce. Believe it or not, this salad improves after a few hours in the refrigerator. The dressing works its way into the peas, cucumbers, and radishes, the flavors meld, and the vegetables become sweeter. Prep Time: 45 minutes, plus at least 2 hours to chill. Notes: To prepare fresh peas, bring a large saucepan of water to a boil. Add peas and 1 tsp. salt. Boil for 1 minute, drain, and plunge peas into ice water to stop cooking. Drain peas and proceed with step 5.