Heat the oil in a large nonstick skillet over high heat. Sprinkle the scallops with salt and pepper. Add the scallops to the pan, and sauté 2 minutes on each side. Remove cooked scallops from the pan, and keep warm.
Melt the butter in the pan. Add the shallots and garlic; sauté 30 seconds. Add the wine and lemon juice; cook 1 minute. Return the scallops to the pan; toss to coat. Remove from heat; sprinkle with parsley. Place the greens in a bowl. Serve the sauteed scallops over the mixed greens. Drizzle the pan juices over.