Sautéed veal with roesti

Ingredients

• 50g butter
• 1 onion finely chopped
• 100g button mushrooms thinly sliced
• 500g veal schnitzel thinly sliced
• 0.5 lemon juice of
• 4 tbsp cream
• Salt and freshly ground black pepper
• spring onions (shallots) sliced, to garnish
• 3 large potatoes about 700g
• 2 tbsp chives chopped
• 60g butter melted
• ¼ cup olive oil (1/4 cup)