how long to bake sweet patatoes at 350
1 Place the cut sweet potatoes in the baking dish and turn them so that they are coated with the olive oil. 2  Sprinkle moderately with oregano, and salt and pepper (to taste). 3  Bake in a preheated 350 degrees F (175 degrees C) oven for 60 minutes or until soft.eady In. 1  Preheat oven to 350 degrees F (175 degrees C). 2  Wash and peel the sweet potatoes. 3  Bake in a preheated 350 degrees F (175 degrees C) oven for 60 minutes or until soft.