Heat 2 inches of water in a small saucepan over medium-high heat until boiling. Add the egg, reduce the heat to medium, and cover with a lid. Let the egg cook for 6 minutes, then remove it from the stove. Side Note: If you are using a jumbo-sized egg, cook for 6 minutes & 30 seconds.
While the egg is cooking, toss the mixed greens and tomatoes with a little vinaigrette, to taste, until evenly coated.
Place into a serving bowl, then sprinkle the top with bacon crumbles and shaved Parmesan.
Once the egg has finished cooking, run the saucepan and egg under cold water until the egg is cool enough to be handled.
Using a knife, gently crack the top edge of the egg, then peel, being careful not to puncture the egg.
Once it is peeled, place it on top of the prepared salad, slice down the center with a knife, and season with sea salt and freshly cracked pepper to taste. Dig in and enjoy!