Rinse and dry scallops.
In a non-stick skillet, melt butter over medium heat. Add scallops and sauté for 1 minute.
Transfer scallops to a bowl.
Add sherry to skillet and cook for 30 seconds.
Stir in mustard and cream.
Return scallops to skillet and cook 1-2 mintues until heated through.
Season with salt and pepper.