1. Wash the sweet potatoes and potatoes. Turn on the oven to preheat.
2. Cut the potatoes and sweet potatoes
3. Mix the sweet potatoes, potatoes, olive oil, salt, black pepper, and rosemary, and let them taste for 10 minutes.
4. Place the vegetables in the baking dish and roast for 40 minutes at about 150 degrees.
5. Alright (you can use a toothpick to check if it is ready during the baking process).
