Boston Lettuce Salad with Celery

INGREDIENTS

• 2 tablespoons olive oil
• 2 tablespoons sherry vinegar or red-wine vinegar
• 1 small shallot, finely chopped
• 1 tablespoon Dijon mustard
• 1 teaspoon honey
• Coarse salt and ground pepper
• 1 large head Boston lettuce (about 1 pound), torn into bite-size pieces
• 2 celery stalks, sliced