Creating the Crispy Chicken Caesar Sandwich is straightforward if you follow these simple steps:

1. Marinate the Chicken: In a bowl, soak the chicken breasts in buttermilk for at least 30 minutes to tenderize the meat and enhance flavor.
2. Prepare Breading: In a shallow dish, combine flour, garlic powder, onion powder, salt, and pepper. In a separate bowl, combine breadcrumbs and Parmesan cheese.
3. Coat the Chicken: Remove the marinated chicken from the buttermilk. Dredge each piece in the flour mixture, shaking off excess. Dip it back into the buttermilk, then coat with the breadcrumb mixture, pressing to adhere.
4. Heat Oil: In a large skillet, heat about ½ inch of oil over medium heat until hot but not smoking.
5. Fry the Chicken: Carefully place the coated chicken in the skillet. Fry for 5-7 minutes on each side, or until golden brown and cooked through (internal temperature of 165°F).
6. Remove and Drain: Transfer the chicken to a paper towel-lined plate to drain excess oil.
7. Build Your Sandwich: Start with the toasted bun, add a generous layer of Romaine lettuce, place the crispy chicken on top, and finish with a drizzle of Caesar dressing.
8. Add Optional Toppings: If desired, sprinkle bacon bits, diced tomatoes, or avocado slices for an extra kick.
9. Top It Off: Close the sandwich with the other half of the bun and gently press down.
10. Serve Immediately: Enjoy while crispy and warm!

These uncomplicated steps ensure that you can make your own delicious Crispy Chicken Caesar Sandwich in no time!