I find that it develops a nice little crust on the bottom if you leave it alone. (wegolden.com)
It's a four step process, really: first you make a simple little crust, which you can do ahead of time. (goodstuff.recipes)
It's a bit fancier than hers were — she did decorate with a lattice - top, but she never bothered with those adorable little crust leaves and apples on the edges, and she skipped on the turbinado sugar. (thecrumbykitchen.com)