This Spaghetti Squash Hash Brown Casserole is exactly like the cheesy potato dish you're used to having at potlucks, but the secret is that there are no potatoes! This healthy casserole uses spaghetti squash instead of the usual shredded hash browns, but the result is as delicious as you remember. Once baked, the spaghetti squash shreds easily into long strands that will fool your party guests into thinking they're eating a hash brown casserole. This spaghetti squash casserole has much less starch than hash brown casserole, so you won't have to feel guilty about indulging in this cheesy dish.