Easy & Hearty Slow Cooker Chicken Pot Pie

Ingredients

• 1 ½ pounds boneless, skinless chicken breasts
• 1 cup diced carrots
• 1 cup diced potatoes
• 1 cup frozen peas
• 1 medium onion, diced
• 3 cloves garlic, minced
• 4 cups chicken broth
• 1 teaspoon dried thyme
• 1 teaspoon dried rosemary
• ½ teaspoon salt
• ¼ teaspoon black pepper
• ½ cup heavy cream or half-and-half
• 2 tablespoons all-purpose flour
• 1 pre-made pie crust
• 1 egg, beaten (optional)