In a dutch oven or steamer, begin by fully steaming the spaghetti squash. Once it is steamed, scrape out the seeds with a fork. Then, use a fork to scrape out the remaining spaghetti squash and set aside.
While the squash is steaming, dice the sausage and prepare the remaining veggies.
Add olive oil and garlic to a skillet turning it to medium heat and add in the veggies and sausage. Let this simmer for about 15-20 minutes until nice and soft.
Once the spaghetti squash is done, add this in and toss with the veggies and sausage.
Serve with Mozzarella or your favorite cheese on top.