Pollock Croquettes with Olives

Name: Pollock Croquettes with Olives
Prep time: 40 min
Cook time: 1 h 40 min
Total time: 1 h 40 min
Yield: 24 pieces
Ingredients: 20 g fresh parsley leaves; 150 g stale white bread; 250 g onions; 2 garlic cloves; 100 g salted butter; 600 g pollock fillets; 200 g double cream; 200 g plain flour; 1 pinch ground black pepper; 2 tsp fine sea salt; 3 large eggs; sunflower oil; 40 g pitted black olives