This easy chicken cheesesteak skillet is a one-pan, high-protein dinner with peppers, onions, mushrooms, and melty provolone, perfect for busy weeknights.
Thinly slice the chicken tenderloins and place in a bowl. Add 2 tablespoons Worcestershire sauce, 3 tablespoons coconut aminos, and 1 tablespoon apple cider vinegar. Toss to coat and marinate for at least 30 minutes.
Slice the bell peppers, mushrooms, and onion.
Heat 1–2 tablespoons oil in a large oven-safe skillet over medium heat. Add peppers and onions and sauté for about 10 minutes, until softened and lightly caramelized.
Add mushrooms, garlic, and red pepper flakes. Cook for 5 more minutes.
Push the vegetables to one side of the skillet.
Add remaining oil to the empty side, then add the marinated chicken. Cook over medium heat for 8–10 minutes, stirring occasionally, until the chicken is cooked through. Stir in about 3 tablespoons remaining coconut aminos.
Arrange provolone slices evenly over the skillet. Broil on low for about 5 minutes, or until the cheese is melted and lightly crisped.