Using homemade or store-bought, cut out the crust however you like. I used a rectangular cookie cutter, creating a shingle-like topping. Feel free to use any cookie cutter you like. You can also roll out the dough and using a knife make shapes, triangles, etc. Get creative! Place the pieces of pie crust on a baking sheet and stick them in the freezer to chill while you make the remaining pandowdy.: When the room fills with the faint, cold scent of pastry straight out of the freezer, you know the crust is set to hold shape during baking. The tactile feedback of pressing a cookie cutter into dough gives you control over the thickness and edge definition. You want the pieces chilled so they brown rather than slump, so keep them on a baking sheet in the freezer until needed. A common mistake is working the dough until it gets warm, which makes the crust lose flakiness, so if it softens take a short chill break before proceeding. Trust the slight firmness under your fingers as the cue to move on.
In a bowl, add the apples, lemon juice, flour, cinnamon and all-spice. Toss together until evenly coated.: The first fresh scent of citrus and spice will hit as you toss these together, and that immediate brightness signals balance. Coating the slices ensures each piece picks up the thickening and seasoning needed to become saucy and deeply flavored. Look for an even dusting on the apple slices rather than clumps of flour, and if you notice uneven coating, use your hands to separate and toss gently. Avoid over mixing here because bruised or mashed apple edges will produce excess liquid during cooking.
In a 9-inch or 10-inch (I used a 10-inch) cast iron skillet, set over medium-low heat, add the brown sugar, heavy cream and butter. Stir it until the butter melts and allow it to come to a boil; cooking at a gentle boil for 3 minutes. Turn off the heat, add the apples and gently mix together until the apples are coated in the butterscotch.: As the butter melts and the sugar dissolves you will hear a soft bubble and smell a toffee like perfume building in the pan. This mix will transition from grainy to glossy, which is the visual clue that it is ready for the apples . Allow it to reach a gentle boil for about three minutes so the flavors meld and bitterness cooks away; you want a light caramel aroma, not a burnt note. A common error is turning the heat too high, which can scorch the sugars, so keep the flame moderated and stir frequently for even melting.
Preheat oven to 375 degrees F.: The moment the fruit hits the hot butterscotch, steam and the scent of warmed apple rise immediately. Gently folding the mixture ensures each slice is lacquered with the sauce without breaking apart. Work carefully so the slices stay intact and present well in the skillet; excessive stirring or pushing can create mushy pieces. If you find the sauce too thin at this point, let the skillet sit off heat for a minute so it thickens slightly before arranging the top crust.
Flatten the apples into one even layer and add the pie crust pieces on top, overlapping them slightly (the crust will shrink so the overlapping is important). Brush the tops of the pie crust pieces with egg wash and sprinkle with turbinado sugar. Transfer to the oven to bake for 35 to 45 minutes, until the crust is golden brown and the butterscotch is bubbling.: The dry heat of the oven is what transforms the top pieces into crisp, golden shards and causes the sauce to bubble and concentrate. You will feel a slight warmth radiating from the oven as it reaches temperature, and that readiness is essential before baking. Do not rush by placing the dish into an underheated oven, because the crust will take longer to brown and the filling may over reduce. Wait until a stable temperature is reached, using the oven light to monitor if needed.
Remove from the oven and allow to cool for about 10 minutes. Sprinkle with the sea salt. The butterscotch is going to be too hot to eat right away. Scoop out mounds into bowls or on plates and serve warm with vanilla ice cream.: The visual of a tidy, overlapped crust is satisfying, and overlapping prevents gaps once the dough naturally shrinks while baking. Brush the tops with egg wash to promote deep browning and sprinkle with turbinado sugar for crunch. You will hear tiny crackles as the crust starts to bake, and the color change to golden is the main visual cue. A frequent misstep is arranging pieces too sparsely which leads to large exposed filling patches, so plan for overlap to keep everything cohesive.
Transfer to the oven to bake for 35 to 45 minutes, until the crust is golden brown and the butterscotch is bubbling: In the oven you will notice the aroma intensify, the top darkening, and the syrup starting to bubble at the edges, which means the filling is thick and the sugars have concentrated. Use a gentle tap on the skillet to hear the faint bubbling, but avoid opening the door too often because that cools the oven and extends bake time. A common trouble is overbaking which can dry the fruit, so start checking near the lower end of the time range and rely on the visual cues of bubbling syrup and golden crust.
Remove from the oven and allow to cool for about 10 minutes: As the skillet cools slightly the syrup will thicken and become spoonable, and the aroma settles into a deep, warm note. Ten minutes gives you safer handling and a better texture for serving, because the filling will hold shape rather than run. Be careful not to skip this rest, as scooping too hot will lead to burns and an overly loose presentation. If the filling still seems excessively runny after resting, give it another five minutes; residual heat will continue to set the sauce.
Sprinkle with the sea salt: That bright, crystalline pop of flaky sea salt across the surface sharpens the sweetness and rounds out flavors, creating tiny bursts of contrast in each bite. The visual of white flakes on glossy caramel is appealing, and the salt enhances the depth of the overall profile. Avoid using too much, because a heavy hand can overshadow the delicate apple notes; a light scatter is all you need to lift the dish.
Scoop out mounds into bowls or on plates and serve warm with vanilla ice cream: Serving warm preserves the contrast between hot filling and cool ice cream, and the first spoonful mixing hot and cold is a highlight of the experience. Listen for the soft sigh as the ice cream meets the hot syrup, and enjoy the meld of textures from soft fruit, crisp pastry, and creamy ice cream. Be mindful that the caramel will remain hot, so allow a brief cool down and warn guests accordingly to avoid burns.