Kangaroo can get tough very easily, which makes it practically inedible, it is horrible.
What cut of meat do you have to roast?

Kangaroo meat is very lean but super high in iron, a great substitute for those with higher blood pressure or cholesterol, weight loss etc. I think people are funny about eating it, but helps to remember that they are the native protein in Australia - not cows and sheep, and Aboriginies have been eating kangaroo for thousands of years before it was a coat of arms

Three are tons of recipes around, but if you tell me what cut you have, I can probably tell you how to roast it properly