Smoked Salmon Potato Rosti Stack

Bahan-bahan (2 porsi)

• 1 lb / 500 g potatoes ((2 large or 3 medium) (see note 1 for potato type))
• 1 tbsp melted butter
• 1 tbsp olive oil
• 1/4 tsp salt
• Pepper
• 3 oz / 100g Smoked salmon
• 2 tbsp sour cream
• Dill to garnish ((optional))