The almond mouse is a regular menu item, and not specifically lactose free as far as I know. It could be, but since its quite creamy I would not be surprised about there being any.

Additionally avoiding nightshades is very difficult in Greece. I mean .. potatoes, peppers, eggplant, tomato.. these are the ingredients many of the national dishes are built upon.

My recent flight was a bit..odd. The appetizer didn't match the menu and the breads served were rock hard. Ironically forgot to take a picture of the almond mouse dessert.