Follow these steps to create your own Crispy Chicken Caesar Sandwich:

1. Marinate the Chicken: In a mixing bowl, combine buttermilk and chicken breasts. Allow to marinate for at least 30 minutes in the refrigerator.
2. Prepare the Breading Mixture: In a shallow dish, mix flour, garlic powder, onion powder, paprika, salt, and black pepper.
3. Dredge the Chicken: Remove marinated chicken from the buttermilk and coat thoroughly in the seasoned flour mixture, shaking off any excess.
4. Bread the Chicken: Next, dip the chicken in the breadcrumbs, ensuring an even coating. Press gently for better adhesion.
5. Heat the Oil: In a skillet, heat the olive oil over medium-high heat until shimmering.
6. Cook the Chicken: Carefully place the breaded chicken in the pan and cook for 6-8 minutes on each side, or until golden brown and cooked through.
7. Remove and Drain: Once cooked, transfer the chicken to paper towels to drain excess oil.
8. Toast the Buns: Cut the buns in half and toast them in the same skillet for a few minutes until lightly golden.
9. Assemble the Sandwich: On the bottom half of each bun, layer with a generous serving of romaine lettuce, followed by the crispy chicken breast.
10. Dress It Up: Drizzle Caesar dressing over the chicken and sprinkle with extra Parmesan cheese if desired. Top with the other half of the bun.

These systematic instructions will guide you in creating a perfectly crispy and delicious sandwich that your friends and family will rave about!