Prepare the hard boiled eggs.
While eggs cool, in food processor or blender, add egg yolks, garlic, and lemon juice. Slowly add truffle oil and olive oil and grape seed oil to form an emulsion. Season to taste and refrigerate.
With a fork, mash the dozen cooked egg yolks and blend thoroughly with 1/2 cup of truffle aioli. Add more to taste if desired. Pipe or fill the hard boiled egg whites with the egg yolk mixture. Refrigerate until cool or up to 6 hours. Serve with finely chopped parsley or minced chives as a garnish.
Makes 2 dozen appetizer servings.