This is like Snails in the Burgundy Style (Escargot) from the other side of the Alps. The Piedmont is also a wine growing region, famous for well-known wines such as Barolo, Barbaresco, Barbera, Gavi, Moscato d'Asti, and more. All of those grape leaves have long produced a quantity of vineyard snails that the Italians prepare in their own way, also with a garlic-parsley-butter but enlivened into a pesto with walnuts and an anchovy.
You can serve these fancy, in snail shells as shown here set in a deviled-egg plate, or without the shells in a snail dish (a simple plate with depressions to hold the snail butter and snails, or just in a serving dish just big enough to hold everything.