01 -
Heat a tablespoon of olive oil in a large skillet over medium-high heat. Once the oil is hot and shimmering, add the thinly sliced yellow onion and both bell peppers. Season generously with kosher salt and freshly ground black pepper. Cook, stirring occasionally, until the vegetables are very tender and beginning to caramelize, about 7-8 minutes. Remove the vegetables from the skillet and transfer to a plate, reserving any juices.
02 -
Add the remaining tablespoon of olive oil to the same skillet, keeping it over medium-high heat. Add the thinly sliced chicken breasts to the pan, spreading them out in a single layer. Season with the Italian seasoning, smoked paprika, salt, and pepper. Let the chicken cook undisturbed for 2-3 minutes to develop a nice brown sear on one side.
03 -
Stir the chicken and continue to cook until it's no longer pink and is completely cooked through, about 4-5 more minutes. The internal temperature should reach 165°F when tested with a meat thermometer.
04 -
Return the cooked peppers, onions, and any accumulated juices back to the skillet with the chicken. Stir everything together to combine and evenly distribute the ingredients. Spread the mixture into an even layer and sprinkle the shredded provolone cheese evenly over the top.
05 -
Cover the skillet with a lid (or aluminum foil if you don't have a lid that fits) and reduce heat to medium-low. Let it sit covered for 2-3 minutes, or until the cheese is completely melted and gooey. Remove from heat and serve immediately.