In a bowl, mix together butter, honey and brown sugar. Mix in egg yolk.

In a separate bowl, mix together flour, baking soda, gingerbread spice mix and salt; add to butter mixture and knead for 1 minute. Cover with plastic wrap; and refrigerate for 1 hour.

Preheat oven to 320 degrees F.

On a sheet of parchment paper, roll out dough to 1/6-inch thickness. Using small gingerbread-man cookie cutter or other small shaped-item (such as a glass), cut out gingerbread men.

Transfer gingerbread men to parchment paper-lined baking sheet; bake on center rack for 8 to 9 minutes or until slightly golden.

Let cool on rack for 15 minutes.

Spread 1 1/4 tsp Nutella® hazelnut spread on the back of one gingerbread man then sandwich with another gingerbread man.

Repeat with remaining gingerbread men and Nutella® hazelnut spread. Mix together confectioners' sugar and lemon juice, adding juice to the sugar, a 1/2 tsp at a time, to make smooth paste. Transfer to piping bag and decorate cookies with icing.