Preheat the oven to 400°.: As the oven warms to 400° , you'll notice a faint dry warmth in the kitchen that promises browning. Proper preheating ensures the crust begins to set immediately, creating flaky layers rather than a soggy bottom. If your oven temperature runs uneven, rotate the pie midway through the bake. A common slip is placing the pie in an oven that is not fully preheated, which can lengthen baking time and affect texture.
Roll out the pie crust in a 9-inch pie dish. Make sure the crust is all the way up to the rim. Poke lightly the dough and place it in the hot oven for 5 to 7 minutes. Remove and let it cool off.: Warm, blind baked crust starts to smell faintly toasted around the edges, signaling the formation of a barrier that keeps the filling from soaking through. Docking the dough with a fork prevents large air pockets, and the short pre bake will give a head start to flakiness. If you skip this stage, the bottom can become undercooked or soggy; watch the crust carefully to avoid over browning during blind baking.
In a large bowl whisk together the eggs, heavy cream, vanilla extract, and brown sugar.: As you whisk, the mixture should lighten slightly and develop a uniform pale color, with the brown sugar dissolving into the cream. Whisking aerates the custard a bit, which helps it set with a tender texture rather than becoming too dense. If you notice undissolved sugar, keep whisking until it's smooth; grainy sugar can cause uneven sweetness and texture.
Add the sliced apples and strawberries to the pie dish. Cover with the egg mixture.: When the fruit nestles into the crust, the colors will contrast beautifully, and pouring the custard over them should look like a gentle bath that does not flood the dish. The custard should just cover the fruit level, and you will hear a faint slosh as it settles. Overfilling can cause bubbling and spillage; ensure the fruit sits comfortably below the rim.
Place a pie shell shield to cover the border of the dough or make one with aluminum foil. Lower the heat to 375°. Bake the cake for 40 to 50 minutes. The top should be nice a golden brown, and the middle should not be runny.: As the pie bakes at 375° , the crust edges will turn a golden brown while the center gradually firms. You may hear a soft popping of juices, and the aroma will shift to a deeper, caramelized fruit scent. The shield prevents the rim from over browning while the filling finishes setting. A reliable test is to gently jiggle the dish near the center; it should be mostly set with a slight tremble. If the center remains liquid after the suggested time, tent with foil and continue baking in small increments.