Ingredients

3/4 cup heavy cream

1/4 cup grainy mustard

1 teaspoon coarse salt

1/4 teaspoon freshly ground pepper

1 head red romaine lettuce, leaves separated and torn into 2-inch pieces

1 head Boston lettuce, leaves separated and torn into 2-inch pieces

1 cucumber, peeled and thinly sliced

1 bunch watercress, thick stems removed

Preparation

Whisk together cream, mustard, salt, and pepper in a small bowl. Cover; refrigerate dressing 30 minutes.

Toss together romaine lettuce, Boston lettuce, cucumber, and watercress in a large bowl. Drizzle with dressing, and toss. Serve immediately.