Peel, boil, cool and dice your sweet potatoes. Mine took about 8 minutes to boil. They should be just fork-tender. You don't want them mushy.
Dice your bacon and pan fry it. Remove from heat, drain and set aside.
To make the dressing,
Cream the butter, using a mixer. Add the mayo and the seasonings and mix thoroughly.
Add the bacon, mozzarella cheese and green onions to the dressing, saving a little of each for a garnish.
GENTLY stir in the sweet potatoes.
Garnish with the remaining bacon, mozzarella cheese and green onions.
Chill until ready to serve.