And you know me...there is NO recipe involved.
I peeled and sliced 4-5 apples and threw them in a bowl with some brown and some white sugar, a pinch of salt, about 1 teaspoon of cinnamon, a splash of citrus (today it was key lime juice...because I had a bottle in the refrigerator) and a tablespoon or two of flour. I stirred it all together, and folded in the blackberries so they wouldn't get crushed. Then I piled the mixture in the center of a "store-bought" pie crust I had sprinkled with about 1/2 tablespoonful of more flour. (I eyeball that step based on how juicy I think the apples will be.)
I ALWAYS bake a crostata on parchment paper for easy clean up since they almost always "leak" onto the cookie sheet and I HATE burned on messes to clean up!
I brushed the crust edges with a beaten egg, and I sprinkled a cinnamon/sugar mixture on the crust and the filling.
Then I baked it at 350 degrees until the apples were tender and the filling was bubbling and thickened. Maybe 30-40 minutes...I didn't set a timer...Sorry!
All we need to add is a big scoop of vanilla ice cream...
And an extra perk?
Your house will smell like Autumn as it bakes!