Giant Bean Gratin

Name: Giant Bean Gratin
Ingredients: 2 tablespoons olive oil; 1 large onion (peeled and diced); 1 carrot (peeled and diced); salt; freshly ground black pepper; 2 cloves garlic (peeled and minced); 1/3 (80ml) cup white wine ((or water, or bean liquid)); 5 cups (120g) coarsely chopped kale leaves; 2 1/4 cups (550g) canned crushed tomatoes; 1 pound (450g) giant beans (cooked drained ); about 1/2 cup (125ml) stock (vegetable or chicken) or bean liquid; 8 ounces (225g) mozzarella (coarsely grated); 1/3 cup (35g) grated Parmesan; coarsely chopped flat-leaf parsley (for garnish)