Ensalada mixta (mixed salad)

Instructions

1. Boil the eggs in water for 10 minutes, then cool them under cold water, peel and cut them into quarters.
2. Wash the lettuce and tear it into pieces in a salad bowl.
3. Cut the tomatoes into wedges, thinly slice the red onion and the pepper into strips.
4. Add the vegetables to the lettuce, then the olives and the flaked tuna.
5. Make the dressing by whisking the oil, vinegar, mustard, salt and pepper.
6. Dress the salad just before serving, then arrange the egg quarters on top.
7. Sprinkle with oregano and toss gently.