Caramelized Onion Mashed Potato Bake
Ingredients
- 4 pounds baking potatoes
- 2 teaspoons salt
- 1 1/4 cups warm buttermilk
- 1/2 cup warm milk
- 1/4 cup melted butter
- 1/2 teaspoon pepper
- 1 teaspoon salt
- 1 1/4 cups freshly grated Gruyère cheese
- 1 cup chopped caramelized onion
- 2 tablespoons chopped fresh parsley