Preparation Blend tuna with oil, mayonnaise, broth, anchovies with oil, lemon juice, lemon peel, and 2 teaspoons capers in processor until smooth, about 2 minutes. Season with salt and pepper. Refrigerate until cold, at least 1 hour and up to 1 day. Arrange spinach on platter. Arrange turkey atop spinach. Pour sauce atop turkey, smoothing surface with knife. Sprinkle with parsley and 1/4 cup capers.
Preparation Blend tuna with oil, mayonnaise, broth, anchovies with oil, lemon juice, lemon peel, and 2 teaspoons capers in processor until smooth, about 2 minutes. Season with salt and pepper. Refrigerate until cold, at least 1 hour and up to 1 day. Arrange spinach on platter. Arrange turkey atop spinach. Pour sauce atop turkey, smoothing surface with knife. Sprinkle with parsley and 1/4 cup capers.