Prepare the potatoes by washing and halving them.
Add the halved potatoes to the crockpot.
In a bowl, combine olive oil, garlic, rosemary, salt, and black pepper.
Pour the olive oil mixture over the potatoes in the crockpot.
Sprinkle the grated Parmesan cheese over the potatoes.
Cover the crockpot and cook on low for 6-8 hours or high for 4 hours.
Once cooking time is complete, uncover and stir gently.
Garnish with chopped parsley before serving.