I cooked the spaghetti squash earlier in the day by cutting it in half the long way and removing the seeds then put it in a 350 degree oven for about 45 minutes. Then you take it out and with a fork you shred the inside by scrapping down the squash to remove the inside. set a side.
In a 9 inch square baking pan or oblong baking dish put the uncooked noodles the jar of sauce and the cooked spaghetti squash. Mix well and add 1 cup water (yes water you can bake any pasta in the oven if you add a cup of water added to the sauce). Mix well. Pour the cheese over top and cover with aluminium foil and bake for 45-50 minutes in a 350 degree oven. Serve hot.