I start by cutting my chicken breast into bite-sized nugget pieces, keeping them roughly the same size. In a medium bowl, I whisk together the egg and buttermilk until fully combined. Then I drop the chicken pieces into this mixture and let them sit while I get the coating ready.
In a separate shallow dish, I mix the panko with paprika, garlic powder, Italian seasoning, salt, and pepper. I like to stir it well with a fork so every crumb gets seasoned evenly. This step is what gives the final nuggets their flavor, so I never rush it.
I lift each piece of chicken from the buttermilk, letting the extra liquid drip back into the bowl. Then I press it into the panko mixture, turning it so every side gets coated. I place the coated pieces on a plate or tray as I go so they're ready to fry in batches.
I heat oil in a large skillet over medium heat, then carefully add the coated chicken in a single layer. I cook the nuggets for about five minutes per side, until they turn a deep golden brown and the chicken is fully cooked through. I avoid overcrowding the pan so each nugget crisps up properly.
Once they're done, I move the nuggets straight to a wire rack set over a baking sheet. This keeps the bottoms from getting soggy the way a paper towel sometimes can. I let them rest for a minute or two before serving so the coating sets.