I thawed it for about 6 hours and baked it for about 40 minutes @ 350F.
It is a fruit pie, and the filling was already cooked so I just waited until the top crust was brown. After it cooled down, I discovered that although the top crust is perfect, the bottom is soggy.
Can anything be done? I think my mistake was I put the pie (it was made in a thin aluminum pie thingy) on a broiling rack, not directly on the oven rack. Or maybe I should have thawed it more.
I don’t know if my method will work on your already baked pie.
I put a pizza stone in my oven, and preheat the oven to a high temp (say 425 to 450) before I put my pie in. I put it right on top of the hot pizza stone, which helps to bake and crisp the bottom crust. After 10-15 minutes at this high heat, I turn the temp down to 350, which will cook the filling without continuing to brown the crust.
That would be my attempted solution, as well. Lightly greased cast-iron skillet, Medium-low to medium heat, and I can’t see any reason why it wouldn’t work.