Preheat oven to 200°C. To make polenta pour water in a small pan (if you have an ovenproof one use that so you can put it in the oven right away) and bring to boil. While constantly stirring add polenta, salt, pepper, cilantro and chili flakes. Once it starts to thicken and the polenta is soft remove from heat and stir in grated cheese and butter.
Pour the polenta mixture into a baking pan and put it in the oven for approx. 25 minutes until it's golden brown on the top.
While the polenta is baking crush the avocado with a fork and add salt and pepper to taste.
Cut baked polenta into equal portions. To serve put a piece to a plate, add 2 tablespoons of sour cream and half of the avocado mixture. I like to add a bit of lemon juice and sprinkle with walnuts. Enjoy!