Season the chicken with Italian seasoning, salt, and black pepper.
Place chicken in the slow cooker and top with minced garlic, sun-dried tomatoes, and red pepper flakes.
Mix the sauce: In a small bowl, whisk together chicken broth, nutritional yeast, and coconut milk. Pour over the chicken.
Cover and cook on low for 6 hours or high for 3-4 hours, until the chicken is tender.
Stir in spinach during the last 10 minutes of cooking until wilted.
Serve hot with steamed green beans or cauliflower mash!
Notes
This is not a classic Tuscan chicken recipe. The sauce is dairy-free, so while still delicious, it's a bit thinner. Use full-fat coconut milk (or heavy cream) for the creamiest sauce. Lite coconut milk will make the sauce thinner.
To thicken the sauce, you can mix 2-3 teaspoons of cornstarch with a splash of water and stir it in 15–30 minutes before serving.