Lettuce, apple, and cucumber salad

Name: Lettuce, apple, and cucumber salad
Prep time: 15 min
Total time: 15 min
Yield: 1
Cuisine: En
Ingredients: 2 cups iceberg lettuce, chopped finely; 1/2 a large apple, chopped; 1 cucumber, sliced (skin on); 2 tablespoons black olives, chopped; Handful of mint; Tablespoon of olive oil; Juice of two limes; Handful of fennel leaves; Handful of walnuts