Irish oat & potato cakes, smoked salmon & green crème fraiche

Ingredients

• 500 g potatoes, peeled and cut into large chunks
• 110 g plain flour, plus extra for kneading
• 50 g oats
• 1 tsp onion powder
• 1 tsp sea salt
• 1 egg yolk
• Zest of 1 lemon, plus extra zest and lemon wedges to serve
• 1⁄2 green chilli, finely chopped
• 60 g butter, melted, plus extra for frying
• 1 tbsp olive oil
• 200 g smoked salmon
• For the green crème fraiche:
• Small bunch dill
• Small bunch parsley
• 1 tbsp capers
• 1 tbsp extra virgin olive oil
• 1⁄2 green chilli, deseeded and sliced
• Zest and juice of 1 lemon
• 150 ml crème fraiche