Begin by slicing the boneless, skinless chicken breasts horizontally to create 4-6 thin cutlets. In a bowl, whisk together eggs and a splash of milk, seasoned with garlic powder, salt, and pepper. Dip each chicken cutlet into the egg mixture followed by a coat of breadcrumbs, pressing gently to adhere. Heat about 1 inch of vegetable oil in a skillet over medium heat and fry the chicken for 5 minutes or until golden brown. Transfer to paper towels to drain excess oil.

While the chicken cools, prepare the garlic butter spread. In a small bowl, mix together melted salted butter, mayonnaise, minced garlic, and chopped parsley until well combined. Take your hoagies or baguette, slice them open, and generously spread the garlic butter inside. Place the bread under the broiler at 450°F for 3-4 minutes, watching closely until the edges turn golden and crispy.

Next, it's time to create a flavorful Caesar dressing. In a mixing bowl, whisk together mayonnaise, sour cream, fresh lemon juice, Dijon mustard, anchovy paste (if using), Worcestershire sauce, minced garlic, along with salt and pepper to taste. This creamy mixture will elevate your Chicken Caesar Sandwiches, ensuring each bite is bursting with flavor. Set aside while you assemble the sandwiches.

To assemble your Chicken Caesar Sandwiches, arrange the toasted garlic butter bread on a clean surface. Layer each hoagie with the crispy fried chicken cutlets, followed by a handful of chopped romaine lettuce drizzled with the zesty Caesar dressing. Top with extra grated Parmesan cheese for a rich finish. Close the sandwich and serve immediately to enjoy the delightful contrast of textures and flavors.