Wolfgang Puck's
Wasabi Mashed Potato:
1 cup spinach leaves
1 cup watercress leaves
2 pounds baking potatoes, like russets, peeled and quartered
1 cup heavy cream, heated
4 ounces butter, cut into pieces
1 tablespoon wasabi paste
Salt and freshly ground black pepper
In a blender or food processor, process the spinach and watercress to a fine puree. Pass through a tamis or stainer. Reserve.
Cook the potatoes in salted, boiling water until done. Pass through a ricer. Whisk in hot heavy cream and butter, 1 small piece at a time. Just before serving, stir in wasabi paste and puree of spinach and watercress. Stir until well incorporated. Season, to taste, with salt and pepper.