In a large bowl, whisk together the oil, vinegar, sugar, garlic, salt, and pepper. Add the greens and green onions and toss to coat well. Top with eggs and capers.
*For perfectly hard-cooked eggs, place eggs in a large pot with cold water to cover. Bring just to a boil then remove from heat. Cover pot and let stand 15 minutes. Rinse under cold water and peel.