Pecan Bourbon Peach Crisp

0 Preheat oven to 375 degrees (F).
1 In a 10" to 12" cast iron skillet, OR 9x13-inch baking dish OR combine the peaches, bourbon, vanilla, brown sugar, cinnamon, and cornstarch. Toss well and set aside.
For the Pecan Crisp Topping:
3 In a large bowl, combine the oats, pecans, brown sugar, cinnamon, and flour.
4 Add in the cubed butter. Using two forks or a pastry blender, cut the butter into the dry ingredients until mixture resembles a coarse, crumbly texture.
5 Sprinkle topping evenly over peaches and bake for 40 to 45 minutes, or until the topping is golden brown.
6 Let cool for about 10 minutes, then serve warm with ice cream, if desired.