medium-grain or Carolina rice (I used 'Nychaki') (about 150 grams) • salt • water (about 480 ml) • whole milk (about 1.2 liters) • heaping tablespoons vanilla-flavored cornstarch or whatever you have (about 30 grams) • ground cinnamon for each serving • sugar (optional, add if you like) (about 100 grams)