Set your chocolate mold on a flat surface so it stays nice and level.
Melt about three quarters of the white chocolate according to the package directions. Stir in a small amount of pink oil-based food coloring until you get a soft pink shade.
Spoon the pink chocolate into each mold cavity, filling it about halfway. Gently press a Vienna Finger into the center, then cover it completely with more chocolate so the cookie is fully sealed inside.
Tap the mold lightly on the counter to release any air bubbles. Place it in the fridge for at least 30 minutes, or until fully set.
Once firm, carefully pop the cookies out of the mold.
Melt the remaining white chocolate. Drizzle it over the tops of the cookies, then immediately sprinkle with strawberry sanding sugar while the drizzle is still wet.
Use small dots of melted white chocolate as glue to attach the strawberry decorations. Let everything set completely before serving or packaging.