01 -
Blend the flour, salt, and baking powder in a food processor. Toss in the butter and pulse until you see pea-sized bits. Slowly add the water and mix until a dough just starts forming, adding more water if it feels too dry. Take the dough out and shape it into a flat round.
02 -
Sprinkle a work surface with flour and roll the dough out until it's about 3 mm thick. Place it in a 23 cm glass tart pan. Trim off any dough hanging over the edges. Chill it in the fridge for 30 minutes.
03 -
Move the oven rack to the bottom position. Set the oven to 200 °C to preheat.
04 -
In a bowl, whisk together the cornstarch and flour. Slowly add the maple syrup and whisk until smooth and lump-free. Stir in the cream and the egg, mixing until it's nicely blended. Pour the mixture into the crust.
05 -
Put it in the oven for about 45 minutes, or until the filling is no longer wobbly. Let it cool at room temperature for 2 hours before slicing and serving.