Chop onions and garlic. Peel and cube butternut squash.
Cook ground chicken, onion, and chopped garlic cloves in olive oil in a large saucepan over medium heat until chicken is cooked through,5 to 6 minutes.
Stir in chili seasoning mix and diced green chiles; cook 1minute. Stir in black beans, fire-roasted tomatoes, San Marzano tomatoes, butternut squash, and chicken stock. Season with kosher salt and black pepper. Simmer,covered, until butternut squash is tender, 8 to 10 minutes.
Serve immediately with your favorite toppings.
Notes
You can save time if you like by purchasing pre-cut squash, if you like. To Freeze: place in a freezer-safe container or bag, can be frozen up to three months.