Roasted Chicken with yolk

2 zucchini (about 8oz in total) 1 1/2 ounces unsalted butter , at room temperature 1 onion , finely chopped 2 ounces cream cheese 1 ounce white breadcrumb,[...]

1 (3 lb) chicken 3 tablespoons olive oil salt and pepper 2 medium potatoes , cut into 1/2 inch chunks (Yukon Gold) 3 medium carrots , cut into 1/2 inch chunks[...]

1 medium chopped onion 2 chopped carrots (bite size pieces) 2 stalks chopped celery (bite size pieces) 4 cups potatoes (bite size) (optional) 2 minced garlic[...]