Dvojitá hrachová polévka (Double Pea Soup with Sausage and Parmesan)

Name: Dvojitá hrachová polévka (Double Pea Soup with Sausage and Parmesan)
Total time: 1 h 15 min
Yield: 6
Ingredients: garlic, as needed; salt to taste; 1 onion; mint, as needed; 200 g sausages; 100 g split peas; 50 g Parmesan; olive oil, as needed; ground black pepper to taste; 1/4 iceberg lettuce; 4 spring onions; 200 g frozen peas; ground ginger, as needed; water, as needed