Garlic Herb Chicken & Sweet Potato Sheet Pan Meal Prep

large sweet potato (, peeled and diced into 1/2-inch wide pieces)

olive oil (, divided)

garlic (, crushed or finely chopped, divided)

dried oregano (, divided)

basil (, divided)

parsley (, divided)

Salt and freshly ground black pepper

| 600 grams boneless skinless chicken breasts (, diced into 1 1/4-inch pieces)

large head of broccoli cut into florets ((about 3 cups of florets))

red pepper ((capsicum), deseeded and cut into wedges)

medium red onion (, cut into wedges)