Bibb and Frisée Salad with Grapes and Celery | America's Test Kitchen

Ingredients

• 1 tablespoon champagne vinegar
• 1 1/2 teaspoons very finely minced shallot
• 1/2 teaspoon mayonnaise
• 1/2 teaspoon Dijon mustard
• 1/8 teaspoon table salt
• 3 tablespoons extra-virgin olive oil
• 1 head Bibb lettuce , torn into bite-size pieces (7 cups)
• 1 small head frisée , torn into bite-size pieces (3 cups)
• 6 ounces red seedless grapes , halved (1 cup)
• 1 celery rib , sliced thin
• 3 ounces blue cheese , crumbled (¾ cup), divided