Clean and wash the iceberg lettuce, then pluck it into bite-sized pieces and place in a large bowl. Add the tuna with the oil (it is best to tear the tuna slightly with a fork).
Then cut the washed tomatoes into pieces and add them. Cut the washed and pitted peppers into strips and add to the salad.
Now season everything with olive oil, vinegar (if you like, you can use red wine vinegar) and salt. Tastes delicious with fresh baguette.