Preheat oven to 375.
In a bowl combine the pineapple juice, Teriyaki sauce, ginger, and set aside. Prick squash with a fork all over.
Prick squash with a fork all over.
Place the squash on a baking pan.
Place in oven and bake for 30 minutes.
After 30 minutes turn half way and place back into the oven and continue baking for 30 minutes bake until cooked through or until it can be easily pricked with a fork.
Remove from oven and allow to cool.
Cut in half and remove the seeds.
Using a fork pull the squash away from the sides of the squash and into spaghetti shreds.
Spread the spaghetti squash on to the baking dish and pour the sauce over the squash.
If it is too cool place back into the oven for 5 - 10 minutes to get warm