Preheat the oven to 400°F (200°C). Unroll the pie crust and place it in mini tart pans, then prick the bottom with a fork.

In a mixing bowl, crack the eggs and whisk them with the crème fraîche (or sour cream), salt, and pepper. Add the diced ham and shredded Swiss cheese. Mix well.

Pour the mixture into the pans and bake for about 12 minutes.