Ok well I've tried spaghetti squash but it didn't turn out to be a good substitute for me although I do like it and will use it for other dishes. What has made a good spaghetti stretcher is shredded zucchini that you blanche off in the pasta water in the last few minutes of cooking. It took my 1 cup portion of pasta and turned it into a 2 cup portion for just 40 extra calories. It was so fresh-tasting too without overwhelming the flavor of the dish. This will be my go-to trick for eating spaghetti from here on out! I am just amazed how good it was and that I could make the calorie exchange and love it!
Just typing this made me want to make it this weekend!

I am so excited I can work spaghetti dinners into my plan and not have to scrimp on calories all day to make it happen! Whohoo!