Creating the Crispy Lemon Pepper Chicken Sandwich is a straightforward, enjoyable process when you follow these steps:

1. Marinate the Chicken: Place the chicken breasts in a large bowl and pour in the buttermilk. Allow them to marinate for at least 20 minutes, or up to overnight in the refrigerator for enhanced flavor and tenderness.

2. Prepare the Breading Station: In a shallow dish, combine the flour, lemon pepper seasoning, garlic powder, paprika, salt, and black pepper. In another dish, pour the breadcrumbs.

3. Coat the Chicken: Remove the chicken from the buttermilk and let the excess drip off. First, dredge each piece in the seasoned flour, then in the breadcrumbs, ensuring an even coating.

4. Heat the Oil: In a large skillet, heat about ½ inch of vegetable oil over medium-high heat until it reaches 350°F (175°C).

5. Fry the Chicken: Carefully add the coated chicken breasts to the hot oil. Fry them for about 5-7 minutes on each side or until golden brown and cooked through. Make sure not to overcrowd the pan.

6. Drain the Chicken: Once cooked, transfer the chicken to a plate lined with paper towels to absorb excess oil.

7. Toast the Buns: In a separate skillet, lightly toast the sandwich buns until golden brown.

8. Assemble the Sandwich: Start with a bottom bun, place a crispy chicken breast on top, and add lettuce and any additional toppings you prefer. Finally, crown it with the top bun.

9. Serve: Enjoy your Crispy Lemon Pepper Chicken Sandwich while hot. Serve with lemon wedges on the side for a refreshing hint of citrus.