Season chicken with salt and pepper. Saute chicken breasts in a pan until golden on both sides. Set chicken aside.
Season plums with rosemary, thyme, minced garlic and add olive oil. Roast for 10 minutes in a 350° oven leaving plums somewhat hard. Let them cool.
Place chicken breasts on sheet pan. Pull chicken skin slightly back and place plum slices like fans under the skin. Roast for 30 minutes in a 350° oven.
To make additional plums as a side-dish, add plums, shallots, honey, olive oil, salt, cinnamon, rosemary, thyme, and black pepper. Toss and add to sheet pan and cook for 15- 20 minutes.
Serve with a vegetable or starch.