Seafood and corn chowder

Name: Seafood and corn chowder
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 1 lemon; 50 g Parmesan cheese; 5 sprigs fresh flat-leaf parsley; 2 - 3 tbsp pine nuts; 2 - 3 leeks; 200 g fennel; 40 g salted butter; 2 tbsp cornflour; 2 tbsp dry sherry; 650 g water; 1 tbsp Chicken stock paste; 40 g lemon juice; 1 tbsp fish sauce; 200 g potatoes; 1 sprig fresh thyme; 1 dried bay leaf; 100 g bacon; 500 g fresh seafood marinara mix; 400 g canned sweet corn kernels; ground black pepper