Large Polenta Pizza with Ratatouille

• olive oil for the pan
• 1 tbsp salt, or more to taste
• 1¼ cups (200

Oil a large (12-inch/30-cm) round cake pan or baking dish. Add the salt to 4 cups (1 l) water in a large saucepan and bring to a boil over high heat. Pour in the polenta in a thin stream, stirring constant