Mash garlic to a paste with the side of a chef’s knife.
Transfer to a small bowl.
Add mayonnaise, lemon juice and Old Bay Seasoning.
Taste. Adjust lemon juice and/or Old Bay, to taste, if needed.
Store in a tightly sealed container, in the refrigerator, until ready to serve. (This can be done in advance. Store in a tightly sealed container, in the refrigerator, until ready to use.)