Chop your tomatoes into quarters. Chop or shred your mozzarella into bite sized pieces. Shred your lettuce and radicchio. Combine your lettuce, cabbage, tomatoes, corn and olives in a large mixing bowl.
In a separate small bowl, whisk together olive oil, vinegar, salt and pepper. Spread evenly over the salad and mix to coat. Top with hard boiled egg, that has been halved and serve!