Preheat your oven to 350°F (175°C).

Roll out the pre-made pie crust on a lightly floured surface.

Use a cookie cutter or a glass to cut circles that fit into the mini muffin tin.

Gently press each circle of dough into the muffin tin, ensuring it's snug against the sides.

In a mixing bowl, whisk together the pumpkin puree, sweetened condensed milk, egg, pumpkin pie spice, vanilla extract, and salt.

Spoon the pumpkin filling into each crust, filling about 3/4 full.

Place the muffin tin in the preheated oven and bake for 20-25 minutes.

Remove the muffin tin from the oven and let the mini pies cool for about 10 minutes.

Carefully remove the pies from the tin and serve warm or at room temperature.