Cut spaghetti squash in half length wise and scoop out seeds. Place in baking dish cut side down with a little bit of water in bottom of pan. Bake about 30 to 45 minutes until you can easily insert fork into squash. Remove from oven and allow to cool about ten minutes.
Once cool take fork and remove strands from squash into large bowl. I then add olive oil, salt & pepper to the squash and scoop strands back into shell dividing evenly.
Alfredo sauce
Meanwhile melt butter over medium low heat. Add chopped garlic and cook couple minutes until fragrant.
Add cornstarch and cook another minute. Add remaining ingredients reserving the parmesan cheese until the end. Cook until thickened and creamy about 8-10 minutes.
Add 1 cup parmesan after sauce has thickened, reserving ¼ cup cheese for topping.
Pour sauce distributing evenly between the two shells. Top with remaining cheese and put under broiler for couple minutes till slightly golden brown.
Pour
Notes
*you could use whole milk in place of half & half servings vary depending on the size of the squash and what else you might be serving this with