Bake for 45 mins or until cooked to a touch with a fork.When the squash is cooked, scrape the flesh with a fork to create noodles & dice your chicken in to small pieces.
While the chicken & squash cook, saute onions with the butter until soft.
Once everything is cooked combine the spaghetti squash noodles, chicken, onion, yogurt, cheese, salt & pepper in a bowl.