Peel both oranges. Break cinnamon. Mix all ingredients ( together in one dish and add salt and pepper to taste.
Peel off the white peel of the remaining oranges and fill the chicken with them. Chicken rubbed and filled with marinade.
Let the oven bake until the internal roast temperature reaches 75 – 90 degrees (here the thermometer will be useful).
Bake at your own discretion – in the bakery or on the pan with foil, removing it at the end to make the roast brown.
If the oven temperature is set to 190 – 200 degrees, baking will take 40 minutes to 1 hour.