3 red lettuce watercress cucumber buttermilk dressing Recipes

eggs, asparagus, trimmed, head butter lettuce, leaves separated (4 cups), watercress, trimmed (1 1/2 cups), cucumber , thinly sliced into half-moons (1/2 cup), radishes, tops removed and cut into quarters, chopped shallots, whole grain mustard, red wine vinegar, light brown sugar, low-fat mayonnaise, low-fat buttermilk

well-shaken low-fat buttermilk, low-fat sour cream, mayonnaise, chopped fresh tarragon or 1/4 tsp dried tarragon, crumbled, minced garlic, mashed to a paste with 1/4 tsp salt, dry mustard , or to taste, chopped red onion, head red leaf lettuce (1/2 lb), torn into pieces, watercress , coarse stems discarded, sliced seedless cucumber (usually plastic-wrapped)