Combine everything in a medium size bowl except pork tenderloin, chicken stock, and root vegetables. Mix until uniform.
In a roasting pan, place trimmed pork tenderloin in and top with half of orange maple sauce. Save the other half in fridge for later.
Cover pork tenderloin and set in fridge for at least 2 hours.
When ready to cook, take marinated pork out and sear over medium high heat in a large skillet. Sear on all sides until golden brown. This will keep the juices in when roasting. Cut tenderloin in half if it does not fit in skillet.
Return seared pork to roasting pan and add chicken or pork stock and top the pork with the remaining orange maple sauce.
Add your cleaned and cut root vegetables to the side of the pork.