For the ginger snap crumble: Preheat the oven to 350 degrees F.
Combine the ginger snap crumbs, flour, sugar and salt. Using your fingers, work in the pieces of butter. Large clumps will form; this is what you want. Spread onto a baking sheet and bake until golden brown, 12 to 15 minutes.
For the sauteed apples: Meanwhile, over medium heat, melt the butter in an enameled cast-iron skillet over medium heat until golden in color, about 2 minutes. In a large bowl, combine the apples, brown sugar, ginger, lemon zest, juice and pumpkin pie spice. Toss to coat all the apples. Add the apple mix to the skillet and saute until tender, 8 to 12 minutes. Remove from the heat.
Divide the apples and crumb topping among plates. Top with the whipped cream. Serve immediately.