01 - Place chicken breasts in the bottom of the slow cooker, ensuring even distribution for consistent cooking.
02 - Layer chopped onions, minced garlic, and broccoli florets evenly over the chicken.
03 - In a medium bowl, whisk together chicken broth, softened cream cheese, sour cream, milk, Dijon mustard, paprika, salt, and pepper until completely smooth and well incorporated.
04 - Pour sauce mixture evenly over chicken and vegetables. Cover and cook on high for 4 hours or low for 6–7 hours until chicken reaches 165°F and is tender throughout.
05 - Thirty minutes before serving, shred or slice chicken directly in the slow cooker. Stir in shredded cheddar cheese until fully melted and incorporated.
06 - For thicker consistency, combine cornstarch with 2 tablespoons water to form a slurry. Stir into slow cooker and cook 15–20 minutes until sauce reaches desired thickness.
07 - Taste and adjust salt, pepper, or paprika as needed. Serve hot over rice, mashed potatoes, or with crusty bread. Garnish with additional cheddar or fresh herbs if desired.