Cutting back on carbs? You won’t regret this healthy substitute! Spaghetti squash is a popular alternative for pasta dishes. One cup of spaghetti squash has about 42 calories, 10 grams of carbs and 2.2 grams of fiber. That’s 7.8 net carbs folks! Spaghetti squash is also rich in antioxidants and may promote digestive health. Give it a try with this tasty recipe from the American Heart Association.