Preheat the oven to 400°F (200°C).
Roll out the puff pastry on a lightly floured surface with a rolling pin into a slightly larger than 9 inches to fit into a 9” pie dish.
1 sheet puff pastry
Add the puff pastry to the pie dish and trim off corners to make it round.
In a bowl, whisk together the eggs, egg yolks, milk, heavy cream, salt, and garlic powder until there are no streaks of eggs left. (You can also put the ingredients in a blender and blend it in a blender.)
4 large eggs, 2 egg yolks, 1 cup whole milk, ½ cup heavy cream, 1 teaspoon garlic powder, ½ teaspoon salt
Add the ham, cheese, and herbs, toss together in the puff pastry, then pour the filling on top, until it is just full (you might have a little filling left).
1 cup Gouda cheese, 12 oz ham, 1 tablespoon chives, 1 tablespoon dill
Bake uncovered for 30-35 minutes. Then reduce the heat to 350°F and bake for another 15-20 minutes, or until fully set on top with no jiggle and inserted toothpick comes out clean. If the dough is starting to brown too much, cover with foil and continue baking.