1. Prepare the Chicken and Slow Cooker: Setting the Stage for Flavor

1. Trim Chicken: Trim any excess fat from the boneless, skinless chicken breasts.
2. Place Chicken in Slow Cooker: Place the trimmed chicken breasts in the bottom of a 5-quart or larger slow cooker.

2. Create the Flavorful Sauce: A Blend of Herbs, Spices, and Cheese

1. Combine Sauce Ingredients: In a small bowl, whisk together the chicken broth, grated Parmesan cheese, minced garlic, dried basil, dried parsley, salt, and black pepper.

3. Pour Sauce Over Chicken: Marinating While Cooking

1. Pour Sauce: Pour the sauce mixture evenly over the chicken breasts in the slow cooker.

4. Slow Cook the Chicken: Achieving Tenderness and Flavor Infusion

1. Cover and Cook: Cover the slow cooker with its lid.
2. Cooking Time: Cook on low for 6-7 hours or on high for 3-4 hours.
   • Check for Doneness: The chicken is cooked through when it reaches an internal temperature of 165°F (74°C) and is tender enough to shred easily with a fork.

5. Shred the Chicken: Creating the Perfect Sandwich Filling

1. Remove Chicken: Once the chicken is cooked, carefully remove it from the slow cooker and transfer it to a plate or cutting board.
2. Shred: Using two forks, shred the chicken into bite-sized pieces.
3. Return to Slow Cooker: Return the shredded chicken to the slow cooker and stir it into the sauce, ensuring it’s well coated.

6. Prepare the Rolls: Toasting for Texture and Flavor

1. Preheat Oven (if using): If toasting the rolls in the oven, preheat your oven to 375°F (190°C).
2. Slice Rolls: Slice the sandwich rolls in half horizontally.
3. Mix Garlic Butter: In a small bowl, combine the melted butter and garlic powder. Stir well.
4. Brush Rolls: Brush the cut sides of the rolls with the melted garlic butter mixture.
5. Toast (Optional):
   • Oven Method: Place the rolls, cut-side up, on a baking sheet and toast in the preheated oven for about 5 minutes, or until lightly golden brown.
   • Skillet Method: You can also toast the rolls, cut-side down, in a large skillet over medium heat for a few minutes.
   • Tip: Keep a close eye on the rolls while toasting to prevent them from burning.

7. Assemble the Sandwiches: Building Layers of Deliciousness

1. Spoon Chicken: Spoon a generous amount of the shredded Parmesan garlic chicken onto the bottom half of each toasted roll.
2. Top with Cheese: Sprinkle shredded mozzarella cheese over the chicken on each roll.
3. Broil (Optional): If you want to melt the cheese further, place the open-faced sandwiches under the broiler for 2-3 minutes, keeping a close eye on them to prevent burning.
4. Add Top Bun: Top each sandwich with the other half of the toasted roll.

8. Serve and Enjoy: Savoring the Savory Goodness

1. Serve Immediately: Serve the Slow Cooker Parmesan Garlic Chicken Sandwiches hot.