Follow these simple steps to create the perfect Crispy Chicken Caesar Sandwich:

1. Marinate Chicken: Place the chicken breasts in a bowl with buttermilk. Let them marinate for at least 30 minutes, or up to overnight for extra flavor.
2. Prepare the Coating: In a separate bowl, combine flour, garlic powder, paprika, salt, and pepper.
3. Bread the Chicken: Remove chicken from the buttermilk, allowing excess to drip off. Dredge each piece in the flour mixture, pressing to ensure a good coating. Then dip into the breadcrumbs, ensuring they are fully covered.
4. Heat Oil: In a frying pan, heat olive oil over medium-high heat.
5. Fry Chicken: Once the oil is hot, carefully add the chicken. Cook for about 5-7 minutes on each side or until golden brown and fully cooked. Use a meat thermometer to ensure the internal temperature reaches 165°F (74°C).
6. Toast the Bread: While the chicken is frying, you can toast the sourdough bread slices in a toaster or on a skillet until golden brown.
7. Assemble the Sandwich: Spread about 2 tablespoons of Caesar dressing on each slice of toasted bread.
8. Add Chicken: Place a piece of crispy chicken on two of the slices of bread.
9. Layer lettuce and cheese: Top each chicken piece with chopped Romaine lettuce and a sprinkle of Parmesan cheese.
10. Complete the Sandwich: Place the other slices of bread on top to complete the sandwich.
11. Serve: Cut in half and enjoy your Crispy Chicken Caesar Sandwich!