Heat a large skillet over medium-high heat then spray with nonstick spray. Season chicken breasts on both sides with seasoned salt and pepper then saute for 3-4 minutes on each side, or until cooked through. Remove chicken to a plate then tent loosely with foil and set aside.
Remove the skillet from the heat to cool for several minutes if using a cast iron skillet, which retains heat, then turn the heat down to medium. Add the extra virgin olive oil then add shallots and saute until golden brown, 1 - 2 minutes. Add prosciutto then saute until crisp, 3-4 minutes. Add garlic then saute for 30 seconds. Add broth and butter then simmer until the sauce has reduced and slightly thickened, 3-4 minutes, using a spatula to scrape up any golden brown bits from the bottom of the skillet. Add capers and a squeeze of fresh lemon juice then stir to combine.
Plate then chicken then spoon the sauce on top and serve.