Preheat the oven to 425℉ / 220℃. Line the bottom and sides of two 7” springform pans with parchment paper. Set aside.
Add the milk, water, butter, sugar, and salt to a medium-sized saucepan. Set the mixture over medium heat, stirring occasionally until the mixture starts to boil.
Once boiling, vigorously mix in the flour until the mixture thickens and clumps up into one cohesive dough. Continue to cook the mixture, continuously mixing, for one more minute.
Remove the dough from the heat and transfer it into a medium sized mixing bowl. Set the dough aside to cool down for 5-10 minutes, until the dough temperature is around 120℉ / 50℃ (or just not too hot to touch.)
While the dough is cooling down, whisk your eggs together in a small bowl.
Once the dough has slightly cooled, slowly beat the whisked eggs into the dough. Have a stand mixer or hand mixer running, and slowly stream in 1/4 of the egg mixture. Beat for ~30 seconds, then beat in another 1/4 of the mixture. Continue until you’ve used up all of the egg, then beat the dough for another minute.
Split the dough between the two lined springform pans. Spread the dough into an even layer. Use the back of a spoon or an offset spatula to form little swoops to make the top of the dough uneven.
Melt 1 tbsp. of butter and brush it over the pastry.
Bake for 8 minutes, then, without opening the oven door, reduce the heat to 375℉ / 190℃. Bake for another 18-20 minutes, until the top of the pastry is golden brown. Turn off the oven and crack the oven door. Leave the pastry in the oven for 10 minutes, then remove it and let it cool to room temperature.
While the pastry is baking, start on the lemon curd and raspberry jam.