Mix all ingredients except the lobster thoroughly in a large bowl. Then very carefully fold the cooked and cooled lobster meat into the mixture and refrigerate until ready to serve.
Preheat the BBQ grill, brush the burger or hot dog rolls with melted butter and place them upside down on the grill — be careful, the rolls burn quickly! Alternatively, the rolls can be toasted in the oven or in a pan.
Pour the chilled lobster mixture directly onto the freshly toasted rolls in equal parts.