Nordic style pizza recipe

Ingredients

• 75ml distilled white vinegar
• 75ml cider vinegar
• 1 tbsp sugar
• 1 tsp fine salt
• 1 small red onion, thinly sliced into rings
• ¼ cucumber, thinly sliced
• 100g self-raising flour, plus extra to dust
• 75g wholemeal rye flour
• 1 tsp baking powder
• 300g Skyr fat-free strained yogurt
• 1 tbsp olive oil, plus 1 tsp to drizzle
• 50g full-fat soft cheese
• 3 tbsp finely chopped dill, plus extra to serve
• 1 tsp lemon juice
• 1 radish, thinly sliced
• 100g smoked trout
• 2 tsp caviar (we used Salmuga salmon caviar)