In a large bowl, add the olive oil, lemon juice, and all the seasonings. Mix well. Set aside.
Trim and cut chicken breast into pieces(3-5 per chicken breast depending on the size). I try to cut the thicker part of the chicken breast in half so that all the pieces are close to the same thickness.
Place chicken pieces in a large gallon size ziplock baggie and tenderize the chicken breasts.
Place chicken breasts in the marinate. Make sure that all the meat is covered by the marinate. Cover and refrigerate for 2 hours.
Take chicken out of the fridge at least 20-30 minutes before baking.
Preheat oven to 425 degrees.
Prep the red onions and Roma tomatoes.
Pour chicken into ceramic dish. Top the chicken with the red onions and Roma tomatoes.
Bake COVERED for 20 minutes. Then remove from oven, top with parmesan cheese and return to the oven UNCOVERED for an additional 10 minutes or until chicken is at least 165 degrees.
Serve over mashed potatoes or quinoa.