1. Preheat oven or electric oven, 400F (200c). Then take out the sweet potatoes, peel them, wash them, and cut them into pieces. Put in a mixing bowl.
2. Chop Rosemary into 2 teaspoons.
3. Pour into the mixing container and mix well.
4. This time I used butter. Put the butter in the microwave to melt it. Either vegetable oil or animal oil can be used. (Duck or goose oil is more fragrant)
5. Pour the butter and stir together.
6. Then spread the sweet potatoes evenly on the baking tray. Bake them in the oven for 20-30 minutes or they will be golden brown. You can flip back and forth repeatedly during this period.
7. After roasting, take out and sprinkle with a pinch of salt and a pinch of black pepper. Try the taste. Load Ramekin (picture). A sprig of rosemary as a decoration.
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