In an 8" or 10” cast iron skillet, over medium heat, saute the sliced apples in a bit of oil or butter until beginning to soften, about 5 minutes.
Add the spices, bourbon, and sugar, and stir to combine. Continue cooking until the sauce thickens and the apples are tender, 5-10 minutes.
Remove from the heat and sprinkle the granola evenly across the top. Enjoy straight from the skillet or serve in individual bowls with a dollop of whipped cream.