Heat 1 teaspoon of the olive oil in a large pan over medium heat. Add the green bell pepper and mushrooms to the pan and cook for 4-5 minutes or until softened.
Add the garlic and cook for an additional 30 seconds.
Remove the vegetables from the pan; place on a plate and cover to keep warm.
Add the remaining 2 teaspoons of olive oil to the pan.
Season the chicken with salt and pepper to taste and place in the pan. Cook for 5-6 minutes per side or until browned and cooked through.
Add the vegetables back to the pan, along with the marinara sauce and olive.
Simmer for 5 minutes or until sauce is heated through.
Sprinkle with parsley and serve.
You can use chicken tenders or thinly sliced chicken breast.
You can also use any cut of chicken, just be aware that the cooking time for the chicken will vary. To check doneness, the best way is to use a meat thermometer. Place it into the thickest part of the chicken, when it reads 165F, it's done.
Make sure you use pitted olives.
If you'd like this Easy Chicken Cacciatore with a little kick, you can add in a teaspoon of crushed red pepper flakes.