Sheet Pan Chicken with Sweet Potatoes Apples and Brussels Sprouts

boneless, skinless chicken breasts, trimmed of excess fat and lightly pounded to a relatively even thickness

extra-virgin olive oil, divided

garlic, minced

chopped fresh rosemary, divided

ground cinnamon

kosher salt, divided

black pepper, divided

Brussels sprouts, trimmed and halved (quarter if very large), about 1 pound

large sweet potato, peeled and cut into 1/2-inch cubes

medium red onion, cut into 3/4-inch pieces

medium Granny smith apple, peeled, cored, and cut into rough 1-inch pieces (these pieces should be larger than the other vegetables)