INGREDIENTS
5
medium potatoes ((peeled and chopped large))
1/2
onion ((chopped))
4 tbsp
butter ((divided))
1/4 cup
+ 2 tablespoons milk
3/4 cup
grated firm mozzarella
1/2 tsp
salt
pepper
1/4 cup
freshly grated parmesan cheese
1 tbsp
finely chopped Italian Parsley