Spaghetti Squash with Salsa is a fabulous Tex-Mex side dish and way to serve spaghetti squash. This recipe uses a homemade salsa (more like pico de gallo) and is absolutely mouthwatering. It’s also filling enough to use for Meatless Mondays. Adding Tex-Mex heat to spaghetti squash is mouthwatering and irresistible. Healthy, low calorie, gluten free, vegan.