I think it was just the wrong kind of dough for this application. A thinner dough, or a pie crust type dough, would have worked much better. It ended up pretty darned sticky, too - next time I'll butter the "pan" - just foil on a cookie sheet this time. I'd still be likely chipping it off a pizza stone!

I bet if I stuck the biscuit dough in like a muffin tin or custard cup it would work, too - but the apples cooking inside the "pocket" helped steam the dough in the middle, rather than letting it bake. I think that's why the one that kinda ended up pizza-like cooked fine, but the others didn't.