Add mashed potatoes and milk and cook for about 4 to 5 minutes. For the sauce, take a pan add some garlic, caper, cream, salt- pepper, parsley and butter. Saute for a while. When the sauce is ready ...

Stir in the chestnuts and cook for 2 minutes, until heated through. Spoon the polenta into warmed bowls and top with the sautéed vegetables. Drizzle with a little oil, season with pepper and serve.