Tuscan Bean and Chicken Italian Sausage Soup

Cook sausage in a large pot over medium-high heat until cooked through and completely browned, 5 to 7 minutes. Drain and discard grease.

Add onion to sausage in the pot; cook and stir over medium heat until onion is translucent, about 5 minutes. Add squash and garlic; cook and stir until garlic is fragrant, about 1 minute more.

Pour broth, beans, and tomatoes into the pot; stir. Add spinach, red wine, and Italian seasoning; bring soup to a simmer and cook until hot, about 15 minutes.