01 -
Pat chicken breasts dry, then season both sides evenly with garlic powder, paprika, salt, and black pepper. Heat olive oil in a large skillet over medium-high. Sear chicken for 4 to 5 minutes per side until golden and fragrant but not cooked through. Transfer to a plate.
02 -
In the same skillet, melt butter over medium. Add sliced onions and mushrooms. Cook, stirring occasionally, until onions are caramelized and mushrooms are tender, about 8 to 10 minutes.
03 -
Sprinkle flour over the sautéed onions and mushrooms. Stir well to coat, and cook for 1 minute. Gradually pour in chicken broth while whisking to prevent lumps. Continue whisking until gravy thickens and becomes smooth, about 2 to 3 minutes.
04 -
Preheat oven to 375°F. Arrange the seared chicken breasts in a baking dish. Spoon the onion-mushroom gravy over each piece. Top each chicken breast with a slice of provolone cheese. Cover the baking dish tightly with foil.
05 -
Bake for 20 to 25 minutes until chicken is cooked through and cheese is melted. Serve hot, spooning extra gravy over each piece.