Prawn mayo sandwich

Name: Prawn mayo sandwich
Prep time: 5 min
Total time: 5 min
Yield: 1 servings
Ingredients: 1 twist of Black pepper; 120 gr of Cooked prawns; 1 twist of Fine sea salt; ½ tbsp of Ketchup; 2 tbsp of Mayonnaise; 1 handful of Romaine lettuce; 2 slices of Sliced bread