Melt the butter in a large soup pot over medium high heat, and saute the onion, carrot, and celery for a few minutes while you chop the cabbage. There is so much cabbage, so give the first few veggies a few minutes to get started first.
Add the sliced cabbage and saute over medium high heat until the cabbage reduces down about half, and gets really soft and sweet. This takes a good 10 minutes to achieve and the flavor is amazing. Stir throughout the cooking process.
Put the potato starch, nutritional yeast, and sausage seasoning blend into the pot, stirring to coat the veggies in the starch and seasonings.
Pour the broth in, stir, and bring the soup to a low simmer for 10 minutes. Turn the stove off, pour in the coconut milk, and blend the soup with your immersion blender or in a regular blender until smooth. Salt and pepper the soup to your taste once it is blended.
