Apple Pie Pull-Apart Bread

Method

1. 1Cook the fillingHeat the cast iron over medium. Add the oil, then the apples, coconut sugar, cinnamon, lemon juice and salt. Cook 6 to 8 minutes until the apples are tender and the pan is dry. Spread on a plate and cool completely. Wet or warm filling makes the layers gummy.
2. 2Make the gelWhisk the psyllium into the warm milk and let it sit 5 minutes until it sets into a thick gel. Whisk in the yeast.
3. 3Mix the doughWhisk the coconut sugar, eggs, oil and vanilla into the gel until smooth. Separately whisk the flours, starches, cinnamon and salt. Add to the wet and beat with a paddle or stiff spatula 3 to 4 minutes until smooth and thick. No kneading, and don't add flour even though it is sticky. Cover and rest 15 minutes.
4. 4Roll outDust parchment with some of the tapioca starch, turn the dough onto it, dust the top and cover with a second sheet. Roll to a 30 x 40 cm rectangle about 5 mm thick. Peel off the top sheet.
5. 5FillBrush with the oil. Mix the coconut sugar and cinnamon and sprinkle evenly. Scatter the cooled apples over and press in lightly.
6. 6Cut, stack, panLine the loaf pan with parchment. Cut the sheet into 12 squares with a bench scraper, stack into 4 stacks of 3, and stand them on edge in the pan, packed snugly. If the squares tear or sag, freeze the sheet 10 minutes first; small cracks bake back together.
7. 7RiseCover and rise somewhere warm until about 1.5x and visibly puffy, 45 to 60 minutes. It won't double. Heat the oven to 350°F (175°C).
8. 8BakeBake 50 to 55 minutes, tenting with foil at 25 minutes. Coconut sugar browns faster, so don't skip the foil. Go by temperature, not color: the center should read 205 to 210°F (96 to 99°C).
9. 9Maple finishWhile it bakes, warm the maple syrup and cinnamon in a small pan until it just bubbles. Brush it over the loaf the moment it comes out, letting it run between the layers, then sprinkle the flaky salt. It has to go on hot to soak in.
10. 10CoolCool 15 minutes in the pan, lift out by the parchment, and cool 30 minutes more so the crumb sets before pulling apart.