Baked Chicken with Spinach and Artichokes

butter

extra virgin olive oil

to 6 chicken pieces ((thighs, chicken breast, legs, etc...))

salt and fresh ground pepper (, to taste)

((14-ounces) quartered artichokes, rinsed and drained)

yellow onion (, thinly sliced)

red onion (, thinly sliced)

large carrot (, sliced into thin rounds)

garlic cloves (, finely chopped, divided)

bag ((6 to 8 ounces) baby spinach)

vegetable broth