Peel and cut the squash into long, thin french fry shapes (roughly 1/3″ thick).
In a large bowl, spray and toss the squash with PAM, using your hands to evenly coat each one. Lay them on a wire rack set on top of a foil-lined baking sheet and salt them generously.
Bake for about 40 minutes, flipping halfway through for even crispness. Serve immediately with extra salt and ketchup.