Fish cakes with beurre blanc sauce

Name: Fish cakes with beurre blanc sauce
Prep time: 30 min
Cook time: 1 h
Total time: 1 h
Yield: 8 portions
Ingredients: 1500 g water; 3 tsp Vegetable stock paste; 400 g potatoes; 450 g boneless white fish fillets; 1 red onion; 3 garlic clove; 3 - 4 spring onions/shallots; 1 bunch fresh dill; 4 sprigs fresh parsley; 50 g cornichons; 1 long red chilli; 40 g extra virgin olive oil; sea salt; ground black pepper; 100 g plain flour; 200 g panko breadcrumbs; 3 eggs; oil; 5 sprigs fresh dill; 2 bunches fresh chives; ½ onion; ½ long red chilli; 4 garlic cloves; 40 g extra virgin olive oil; 250 g cherry tomatoes; 100 g white wine vinegar; 1 lemon; 1 tbsp Dijon mustard; 280 g salted butter; sea salt