One Pan Lemon Garlic Parmesan Chicken

3 tablespoons freshly squeezed lemon juice

1 teaspoon lemon zest

1/4 cup extra virgin olive oil

1/2 teaspoon oregano

1 teaspoon garlic powder

2 1/2 teaspoons kosher salt, divided

1 teaspoon freshly ground black pepper, divided

2 pounds red potatoes, cut into 1-inch cubes

3 boneless skinless chicken breasts

1 (8-ounce) package steam-in-bag green beans

3 tablespoons softened butter, divided

2 tablespoons mayonnaise

1/3 cup freshly grated Parmesan cheese

chopped fresh parsley for garnish