Brown the Venison in a pan or skillet with olive oil and the large garlic cloves. Salt the venison in this stage.
Place the venison and garlic in the slowcooker with the apple, onion, carrots, and potatoes. Cover with beef broth. Set to boil. Then, turn to Low Simmer. Add the spices and stir.
Cook until the roast is tender, about 6 to 7 hours. Carrots and potatoes will get tender during this time as well.
When the roast has cooked, remove it from the slow cooker and place onto a serving platter. Discard the apple. Take out the root vegetables and put in a serving bowl.
Bring the remaining liquid to a boil and bring to about 1/2. Use as a sauce for the meat.