'2 lbs of well-washed sweet potatoes, peeled'
'4 tablespoons of butter'
'2 eggs'
'1 1/4 cups of grated mozzarella cheese'
'1/4 cup of grated Parmesan cheese'
'1 large carrot, grated in coarse texture'
'8 tablespoons of finely chopped onion'
'Salt and black pepper to taste'
'2 tablespoons of all-purpose flour'
'2 lbs of well-washed sweet potatoes, peeled'
'4 tablespoons of butter'
'2 eggs'
'1 1/4 cups of grated mozzarella cheese'
'1/4 cup of grated Parmesan cheese'
'1 large carrot, grated in coarse texture'
'8 tablespoons of finely chopped onion'
'Salt and black pepper to taste'
'2 tablespoons of all-purpose flour'
'Boil the sweet potatoes, peel, drain, and puree them'
'Add the remaining ingredients, except for the all-purpose flour and 1 tablespoon of butter'
'Grease a round refractory mold with 22 cm diameter, dust it with 1 tablespoon of all-purpose flour'
'Place the sweet potato mixture and smooth the surface'
'Dust with the remaining all-purpose flour'
'Top with the remaining butter, broken into small pieces'
'Bake in a moderate oven (180°C) for about 30 minutes or until golden brown and puffed up'
'This recipe can be prepared ahead of time by refrigerating it for 8 hours
Simply increase the baking time to 15 minutes when reheated'
'It can also be cooked in a microwave at high power for 15 minutes, then serve it warm'
'Serve 6 portions.'