I'm not sure when lobster mashed potatoes started becoming a thing. If I was to make a somewhat educated guess I'd say Jasper White had his hand in things. But, like many great ideas that get handed off and explored the end result becomes diluted. I love the idea of sweet tender lobster. And I certainly enjoy decadent buttery mashed potatoes. And I am usually the guy wanting the lobster mashed potatoes. The problem is when they are combined the sum is less than the individual parts. The lobster overcooks. Its juices dilute the flavor of the potatoes and make them grainy. And the lobster to potato ratio is not easily controllable. Instead of combining them we separated them. And only at the table did I bring them back together. Our all butter potatoes shined. The lobster was juicy, sweet and firm. The two were great together when we treated them as individuals.