Spring Leaf Salad

Name: Spring Leaf Salad
Ingredients: 6 Tbsp. extra virgin olive oil; 1/4 cup mayonnaise; 2 Tbsp. white balsamic vinegar; 4 tsp. finely chopped garlic or shallot (from 4 garlic cloves or 1 shallot); 2 tsp. honey; 1/8 tsp. crushed red pepper; 3/4 tsp. kosher salt; 3/8 tsp. freshly ground black pepper, divided; 2 small bunches radishes (about 1 lb. total), with leaves; 2 cups watercress; 2 1/2 cups pea tendrils, tough stems removed, or baby arugula; 1/2 cup thinly sliced celery, plus 1 cup fresh leaves (from 1 bunch)