4 lg. potatoes, not peeled but quartered and cooked
4 tbsp. butter
1 tbsp. grated horseradish
1 bunch green onions
1 tbsp. garlic powder
2 tbsp. Parmesan cheese
1/2 c. milk
Salt and pepper

Saute onions in butter. Mash potatoes with onions and remaining ingredients. Heat in oven, then serve.