How to Make It
Whisk together oil, vinegar, shallot, mustard, salt, and pepper in a small bowl. Set aside.
Cook green beans according to package directions; drain.
Cook gnocchi according to package directions; drain. Toss gnocchi with 2 tablespoons dressing. Arrange gnocchi, green beans, artichokes, tuna, olives, roasted peppers, and, if desired, egg halves on a serving platter. Drizzle with remaining dressing.