Meat and Mashed Potatoes Burger Recipe

Ingredients

• 2 large baking potatoes, peeled and cut into chunks
• kosher salt
• pepper
• 3 -4 tablespoons heavy cream or 3 -4 tablespoons half-and-half
• 1 tablespoon butter
• 1 large egg
• 2 -3 tablespoons finely chopped chives
• 2 lbs ground chuck
• 3 -4 tablespoons Worcestershire sauce
• flat leaf parsley, a handful chopped
• 3 tablespoons grated onions
• 2 tablespoons extra virgin olive oil
• 4 poppy seed rolls or 4 plain kaiser rolls, split and toasted
• Dijon mustard
• 1 bunch watercress, trimmed of thick stems