Carefully slice the chicken breasts in half lengthwise, then transfer them to a waiting plate. Set aside.
2 lbs large boneless, skinless chicken breasts
Add all of the seasonings to a small bowl, then whisk them all together until evenly combined. Season both sides of each breast the seasoning mixture.
1/2 tsp onion powder, 1/2 tsp garlic powder, 1/2 tsp Italian seasoning, 1/2 tsp smoked paprika, 1/2 tsp salt, 1/2 tsp black pepper
Add the oil and butter to a large skillet set over medium heat to melt. Add both the mushrooms and onions to the skillet, gently tossing them to combine. Saute them, stirring often, until the mushrooms have softened- about 5-7 minutes.
2 tbsp extra virgin olive oil, 2 tbsp butter, 2 cups sliced white button mushrooms, 1 small yellow onion
Add the garlic, stir to combine, and saute an additional 60 seconds.
4 garlic cloves
Add the seasoned chicken to the skillet and let it cook for 6-8 minutes.
Turn the heat down to medium low, drizzle the remaining oil over the chicken, then flip each piece over and cook another 3-4 minutes- just until the juices run clear.
Pour the broth into the pan and use a sturdy spoon to scrape any stuck on browned bits off the bottom of the pan. Spoon a bit of sauce, mushrooms, and onion over each piece of chicken.
1/4 cup chicken broth
Remove the skillet from heat, sprinkle the cheese evenly out overtop of the chicken breasts, then cover the dish with lid and let rest to melt the cheese.
1 cup shredded Monterey jack cheese
Spoon more of the juice and vegetables overtop the chicken, and serve!