Follow these simple steps to create your Vodka Sauce Chicken Parmesan Sandwich:

1. Prep the Chicken: Begin by flattening the chicken breasts to an even thickness using a mallet. This allows for even cooking.
2. Season the Chicken: Sprinkle both sides of the chicken with salt, pepper, and Italian seasoning for added flavor.
3. Set Up Breading Station: Prepare three bowls: one with flour, another with beaten eggs, and a third with breadcrumbs.
4. Bread the Chicken: First, dredge each chicken breast in the flour, shaking off any excess. Next, dip it into the beaten eggs, and finally coat it with breadcrumbs, pressing lightly to stick.
5. Heat Oil: In a large skillet, heat about half an inch of olive oil over medium heat.
6. Fry the Chicken: Once the oil is hot, carefully place the breaded chicken in the skillet. Cook for 5-7 minutes per side, or until golden brown and fully cooked through. Remove and place on paper towels to drain excess oil.
7. Warm the Vodka Sauce: In a separate saucepan, warm the vodka sauce over low heat, stirring occasionally until heated through.
8. Assemble the Sandwiches: Toast the slices of bread lightly. Place a piece of fried chicken on each slice. Spoon a generous amount of vodka sauce over the chicken.
9. Add Cheese: Top with shredded mozzarella cheese, allowing it to melt slightly by covering the pan for a minute or two.
10. Garnish and Serve: If desired, add fresh basil leaves on top of the melted cheese before closing the sandwich with another slice of bread.