- 2 1/2 tablespoons vegetable oil
 - 2 tablespoons sour cream
 - 2 teaspoons fresh lemon juice
 - 2 tablespoons minced fresh parsley leaves
 - 10 radishes, sliced thin
 - 6 medium white mushrooms, sliced thin
 - 4 Boston lettuce leaves
 
- In a bowl whisk together oil, sour cream, lemon juice, parsley, and salt and pepper to taste until smooth. Add radishes and mushrooms and toss gently to coat with dressing. Nestle 1 lettuce leaf inside another, rib sides down, and arrange on plate to form a cup. Repeat with remaining lettuce and divide salad between lettuce cups.