Good Day is a brand of rich butter cookies. I took 6 of those, put them in a plastic bag and beat them to crumbs with a rolling pin. Added 20 grams of melted butter and pressed the whole mixture onto the base and sides of a 3 inch tart pan. This I left to set in the fridge for an hour.
Once the base was set, I added a layer of caramel sauce. Chilled it for half an hour or so, then covered it with a layer of ganache. After some more chilling, I discovered the richest, most delicious tart I've tasted.