To prepare the chicken, make a slit in the side of the breast creating a large pocket for stuffing. Stuff spinach, goat cheese and prosciutto into the pocket of each breast. Sprinkle with olive oil, salt & pepper generously.
Spread all of the cut vegetables on a baking sheet, drizzle with olive oil and lots of salt & pepper.
Place the chicken breasts and vegetables in the oven at the same time and roast for 20 minutes (it may take longer depending on the thickness and size of your chicken breasts).