Preheat oven to 350-degree F.
Place the washed dried whole white sweet potatoes on a baking tray and add water so that the surface of the tray is covered.
Place the baking tray in a preheated oven for about 25-30 minutes or until the potatoes are soft. Make sure the potatoes are soft from the outside. They should be semi-cooked.
Once they are cooked halfway through, remove them from the oven and let them cool.
Cut the white sweet potatoes into wedges and place them in a large bowl.
Heat frying pan over low heat, add olive oil, smashed garlic, and fresh rosemary spring.
Once the oil becomes fragrant, about a minute, remove the pan from heat.
Pour the infused garlic and rosemary oil into a small bowl and let it cool.
Once the potato wedges are cool, add two tablespoons of garlic and rosemary oil, rosemary spring, and a pinch of pink Himalayan salt and mix well.
Grease a baking tray by brushing garlic rosemary oil on it.
Place potato wedges on the baking tray skin-side down.
Place the baking tray in a preheated oven at 425-degree F for 30 minutes or until the white sweet potatoes start getting a golden-brown color.
Remove the tray from the oven and serve.