Healthier Broccoli Chicken with Creamy Cheddar Mushroom Sauce - Graceful Flavors

Ingredients

• 8 ounces uncooked whole-wheat rotini or preferred pasta
• 1 large head of broccoli, cut into bite-sized florets (approximately 1 pound)
• 2 tablespoons butter or olive oil
• 1 small white onion, thinly sliced
• 8 ounces baby bella (cremini) mushrooms, thinly sliced
• 4 cloves garlic, minced
• 3 tablespoons all-purpose flour
• 1 cup chicken stock or vegetable stock
• 1 1/2 cups milk
• 1 teaspoon Dijon mustard
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon freshly cracked black pepper
• 2 cups shredded sharp cheddar cheese, divided (8 ounces total)
• 2 cups diced or shredded cooked chicken