Creamy Green Pasta

Name: Creamy Green Pasta
Ingredients: Flaky sea salt and freshly ground black pepper; 14 ounces (400 grams) tagliatelle or pasta of your choice; 1 tablespoon olive oil; 1 leek, trimmed, rinsed and finely chopped; 5 ounces broccoli (1/2 head), cut into bite-sized florets; 1 cup frozen peas, thawed; 6 ounces frozen spinach, thawed and finely chopped (4 pieces); 2 tablespoons B12 nutritional yeast flakes; 2 1/2 cups unsweetened plant-based single cream (light cream); Zest of 1 lemon; 2 tablespoons extra-virgin olive oil; 2 slices stale bread, processed to fine crumbs; 1/4 cup fresh flat-leaf parsley leaves, finely chopped