Preheat the oven to 200 degrees Celsius (392 degrees Fahrenheit), regular oven.
Roll out the dough and cut out 6 circles, for instance using a large glass or a small plate, so you have small circles that fit into a muffin tin. The dough should go slightly over the edge.
Press the dough around the form, so it becomes the base of the pie, and brush the edge with a bit of water.
Distribute your filling in the tart shells and season well with salt and pepper.
Cut out 6 slightly smaller circles and place them on top of your tarts as a lid. Press the edges together with a fork.
Bake the tarts for about 20 minutes until they are nice and golden.