Quebecois Maple Cream Pie

Step 1: Prepare pie shell according to package instructions, or make your own and bake.

Step 2: Preheat oven to 300 degrees F (150 degrees C). Place the pie crust in its plate in a large, shallow baking pan lined with foil in case of a boil-over.

Step 3: Bring maple syrup to a boil in a heavy saucepan over medium heat, and cook for 5 to 7 minutes, to reduce syrup down by about one-quarter.

Step 4: Stir in cream, bring the mixture to a simmer, then remove from heat.

Step 5: Whisk egg yolks and egg together in a large bowl. Very gradually add the cream mixture to the eggs, about 1/4 cup at a time, whisking constantly.

Step 6: Stir in salt, vanilla extract, and vinegar.

Step 7: Pour the batter into the prepared pie crust.

Step 8: Bake until the pie is mostly set but jiggles slightly when moved, about 1 hour.

Step 9: Let cool before serving.