tuna, cucumber and avocado salad

Name: tuna, cucumber and avocado salad
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Yield: 2 servings
Ingredients: 1 Avocado; 1 twist of Black pepper; 1 Canned tuna steak; 0.5 Cucumber; 1 drizzle of Extra virgin olive oil; 1 pinch of Fine sea salt; 0.5 Lime; 1 Romaine lettuce