1. In a small container, shake the olive oil, vinegar, salt, and pepper together to make the salad dressing until well combined, and then set aside.
2. Place 2 cups of mixed greens, 1 cup of cucumber, ¼ cup of green onion, 4 ounces of tuna, 5 full cherry tomatoes, and 2 hard-boiled eggs in two bowls.
3. Pour half the salad dressing over each bowl and toss everything together.
4. Once the salad is dressed, dig in and enjoy!