Preheat oven to 375 degrees F and spray muffin tins with non-stick spray.
Roll out your pie dough. Using a 2 or 3 inch round cookie cutter, cut your circles out of the pie dough.
Fill each muffin tin with one circle of pie dough, making sure to firmly press them against the sides of the tin. Poke the dough a few times in each muffin tin to keep the pie crust from puffing up during the baking process.
In a skillet, sauté your diced onion. Remove from heat and add the diced ham to the pan.
Spoon the ham and onion mixture into each mini quiche crust.
In a large mixing bowl, whisk your eggs, heavy cream, cheese, salt, and seasonings.
Pour into each mini quiche carefully.
Bake the mini quiches for 25-28 minutes, or until the quiches are set up.
Let them cool on a wire rack for 5 minutes and enjoy!