Smoked Salmon and Rösti Appetizers

Name: Smoked Salmon and Rösti Appetizers
Ingredients: 300 grams Smoked salmon; 2 Scallions; 3 sprigs fresh flat-leaf Parsley; 3 tablespoons Caper (from a jar); 1 teaspoon green Pepper (from a jar); 1 teaspoon Mustard; 4 tablespoons white Balsamic vinegar; Salt; freshly ground pepper; 1 package frozen Hash brown (450 grams) (approximately 16 ounces); 2 Belgian endives; 5 tablespoons Milk; 75 grams Creme fraiche cheese; 2 teaspoons Horseradish (from a jar); Chives; 1 Red Onion