Snapper Soup

2 small potatoes 2 small carrots 1 pound red snapper fillets 4 teaspoons olive oil 2 cups water boiling 1 teaspoon white wine vinegar 1 1/2 teaspoons salt 2[...]

3 1/2 lbs veal knuckle 1 cup fat (chicken fat preferred, but whatever you want to use is fine) 3 onions , peeled and minced 2 stalks celery , chopped 2[...]