Poached salmon and beetroot blinis

Name: Poached salmon and beetroot blinis
Prep time: 20 min
Cook time: 45 min
Total time: 45 min
Yield: 25 portions
Ingredients: 1000 g water; 350 g fresh skinless, boneless salmon fillets; 100 g raw beetroot; 1 lemon; 100 g watercress; 1 tbsp Greek yoghurt; 1 tbsp cream cheese; 3 sprigs fresh dill; ¼ tsp salt; ¼ tsp fresh ground black pepper; 2 tsp unsalted butter; 150 g buckwheat flour; 50 g wholemeal self-raising flour; 1 tsp baking powder; 225 g full cream milk; 1 egg; ½ tsp sea salt; olive oil spray; sprig fresh dill; fresh ground black pepper