*MAKE DAIRY-FREE: Swap the 2% reduced fat milk for either unsweetened plain almond milk or cashew milk. Also, swap the grated Parmesan cheese for nutritional yeast, which boasts the same cheesy flavor.
As for the mozzarella, I suggest using your favorite brand of shredded vegan cheese. I personally like Follow Your Heart brand, however Daiya mozzarella style shreds melt nicely, too.
*STORE: You can store the stuffed spaghetti squash boats as is, or empty them into a Tupperware container. Either way, they will last up to 3 days refrigerated.
*REHEAT: If reheating in the oven, you can keep the squash boats filled, and heat them at 300°F until warm. Otherwise, spread the squash mixture onto a plate and microwave until warm.