Sweet Potato, Chocolate, and Hazelnut Cake

Name: Sweet Potato, Chocolate, and Hazelnut Cake
Prep time: 45 min
Cook time: 45 min
Total time: 1 h 30 min
Cuisine: American
Ingredients: 1-2 sweet potatoes, peeled, resulting in 1 cup mashed; ¾ cup canola oil; 2 eggs; 1½ cup all purpose flour; ¾ cup granulated sugar; 1 teaspoon baking powder; 1 teaspoon baking soda; 1 teaspoon cinnamon; ¼ teaspoon ground ginger; ¼ teaspoon ground cloves; ¼ teaspoon nutmeg; ½ teaspoon salt; ½ cup hazelnuts, finely chopped; 2 ounces semi-sweet chocolate; ½ teaspoon vanilla extract; ¼ cup half and half