Ingredients: For the dressing: 3 tablespoons olive oil 2 tablespoons fresh lemon juice 1 tablespoon Dijon mustard (optional) 3 teaspoons honey 2 teaspoons chopped fresh thyme Salt and pepper to taste For the salad: 4 cups watercress 1 1/2 cups thinly sliced apples 1 cup thinly sliced cele…