I haven't put much by way of measurements into this recipe since it'll depend on your personal tastes, to a large extent, and how much you're planning on making. A single sheet of 300g pastry will make roughly 18 bites.
Ingredients
300g short crust pastry
150g Brie
Cranberry sauce
Instructions
Preheat oven to 200C
Roll the pastry to a thin and even layer.
Cut the pastry into 18 squares - rounds will do fine too.
Place each square into a muffin case and cook for 15 - 20 minutes until golden brown.
In the meantime, slice brie into squares large enough to fit inside the muffin trays.
As the pastry comes out of the oven, while it's still piping hot, drop the brie onto it so that it begins to melt. Top with the cranberry sauce.
These are best served hot, but can be eaten cold too.
Recipe by Keeper of the Kitchen at https://www.keeperofthekitchen.com/2014/11/27/brie-cranberry-bites/