The Parts Unknown host also calls Twitter and Instagram a fully democratic bathroom wall. How to Cook Spaghetti Squash. Spaghetti squash is a good alternative to pasta, potatoes, or rice. The cooked squash flesh shreds into threads like thin spaghetti or vermicelli, hence its name. On average, a spaghetti squash measures about 1. The squash should be an even light yellow color and firm with no bruises. Store whole at room temperature up to 3 weeks. How To Marinate Frozen Fish. Spaghetti squash is available year round with peak season in fall. Spaghetti squash has a very mild flavor, thus it is. MORE usually served with a sauce of some sort. It also may be enjoyed simply with salt and a bit of butter. Cooking the squash is very simple. You will need 1 spaghetti squash. Large sharp knife. Baking pan. Oven.