Italian Sausage and Gnocchi Soup

Name: Italian Sausage and Gnocchi Soup
Cuisine: European, Italian, Mediterranean
Ingredients: 2 tbsp olive oil; 1 cup roughly chopped leeks; ½ cup roughly chopped celery; 2 cloves garlic, finely chopped; 1 lb mild Italian sausage; 8 oz baby bella mushrooms, quartered; 4 cups chicken broth; 1 (14.5 oz) can fire roasted diced tomatoes; ½ tbsp dried oregano; ½ tbsp dried parsley; 2 bay leaves; 1 lb dried gnocchi; 1 ½ cups roughly chopped kale; 1 ½ cups roughly chopped swiss chard; ½ cup shredded Parmesan cheese; 2 lemons, cut into wedges