Marinate the scallops in the lemon juice, salt, and pepper for 5 minutes per side. Keep the marinade to add to the sauce later.
Melt the butter along in a large preheated saute pan over medium-high heat. Add scallops to the Cook in batches if needed. Sear both sides of the scallops. Do not overcook the scallops. Remove the scallops and place them on the plates.
Reduce the heat to medium and add the garlic to the saute pan. When the garlic aroma comes out, add the marinade to the pan and saute for only 30 seconds. Scrap up the brown bits on the bottom of the pan, if any.
Drizzle the sauce over the scallops. Garnish thechopped shallots and serve right away.