Heat oil in a large dutch oven or stockpot over medium-high heat. Add in your ground meat, Italian seasonings, fennel seeds, and fresh minced garlic.
Sprinkle with sea salt and pepper and cook, breaking the meat with a wooden spoon, until cooked through.
Stir in onion, carrot, and celery then continue to cook for another 4 minutes, stirring occasionally.
Pour in your chicken broth, bring soup to a boil, then reduce the heat to simmer.
Add in the cauliflower and simmer until fork-tender, about 10 minutes.
Meanwhile, in a large jar whisk milk and flour until well combined.
Pour this milk/flour mixture into your soup and continue to simmer for a few minutes more until it begins to thicken.
Add in the spinach and stir just until wilted.
Taste test and adjust seasonings if desired.
Ladle your delicious soup into bowls and sprinkle with crumbled bacon and freshly ground black pepper.
Enjoy!