Preheat the oven to 400 degrees F. Spread the bacon on a wire rack fitted over a baking sheet. Bake until nice and crispy, 12 to 15 minutes.
Mix the milk, brown sugar, salt, egg yolks and vanilla bean seeds in a baking dish to make the batter.
Heat 1 tablespoon of the butter in a large nonstick skillet to medium. Dunk each side of the bread into the batter for a few seconds a side. Fry 2 slices of the battered bread until golden brown, 4 to 5 minutes per side. Repeat the process, wiping the skillet clean between each fry, until you have perfectly golden brown and delicious French toast. (You can hold the French toast in a 200 degree oven on a wire rack set in a baking tray to keep warm if need be.)
When the French toast is done, schmear each piece with some Mascarpone Cream. Then top with a pile of raspberries and 3 slices bacon. Close, cut in half and serve with maple syrup for dunking.
Mix together the mascarpone, malt powder, maple syrup, salt and vanilla bean seeds in a bowl, and then set aside until ready to use.