OK, not truly "spaghetti". But shiritake tofu noodles have a look, texture and taste that are fairly close to pasta noodles -- delicious! And a 4-oz serving is only 20 calories.
I buy the House Foods brand, 8-oz bag of shiritake tofu noodles, and eat the whole bag with 4 Tbsp of salsa. It's a healthy, hunger-busting treat for only 60 calories!