Set a Dutch oven or other large pot over medium heat and add bacon. Cook until crispy, turning once, about 6-8 minutes (cook in batches if necessary). Remove from pot, chop and set aside.
Add the butter and, when melted, add the onion, carrot, celery, garlic, thyme and a dash of salt and pepper. Cook, stirring now and then, until the onions are translucent and vegetables are beginning to soften, about 5-8 minutes.
Add vermouth and cook for about a minute, stirring to scrape any brown bits from the bottom of the pan. Add the chicken stock and wild rice and bring to a boil over medium high heat.
Once boiling, reduce heat to low, cover and simmer for 45 minutes to 1 hour, until rice is tender.
Add spinach and cover. Cook for a minute or two, just until spinach is wilted. Stir in cream, parsley and reserved bacon, season with salt and pepper to taste and serve.