Potato bread with salmon and pickled cucumber

Name: Potato bread with salmon and pickled cucumber
Ingredients: 105g tin salmon, bones removed (tuna works too); 1 tbsp freshly chopped dill, or other soft herbs; 1 tsp olive oil; freshly ground black pepper; pinch cumin; 2 tsp sea salt; ½ cucumber, sliced into ribbons using a vegetable peeler; 2 tbsp caster sugar; 3 tbsp white or red wine vinegar; 1 dried bay leaf; 400g/14oz cold mashed potatoes; 40g/1½oz melted butter; 90g/3oz self-raising flour (or 90g/3oz blended oats mixed with 1 tsp baking powder); pinch salt; dash oil, for frying