Notes: If making dressing up to 1 week ahead, cover and chill. (You can substitute 1 1/2 cups purchased dressing if desired.) To crisp romaine, trim root ends off lettuce, separate leaves, rinse, and drain well. Wrap in towels, slip into a plastic bag, and chill at least 30 minutes or up to 3 days. Up to 4 hours ahead, arrange vegetables in a bowl; cover with a damp towel, invert a plastic bag over vegetables, and chill.
1 cup reduced-fat sour cream
1 cup crumbled blue cheese (about 4 oz.)
2 teaspoons lemon juice
1 teaspoon Worcestershire
1 clove garlic, peeled and pressed or minced
1/8 teaspoon coarse-ground pepper
1 pound romaine hearts, rinsed and crisped (see notes)
4 ounces radishes or cherry tomatoes, rinsed
How to Make It
In a small bowl, mix sour cream, blue cheese, lemon juice, Worcestershire, garlic, and pepper.
Stand romaine leaves, tips facing up, snugly in a bowl that is one-half to three-fourths the height of the romaine spears. Trim and discard most of the leaves from radishes, leaving one or two small ones attached. Scatter radishes or cherry tomatoes around lettuce.
Serve vegetables and dressing together, so guests can dip lettuce leaves and radishes or cherry tomatoes.