Eggy sweets such as this pudding are a mainstay of Portuguese cooking. They are also designed to use what's already in your kitchen supply, for whipping up anytime and in case you have surprise guests. Here, the eggs are separated and the yolks mixed with milk that's been infused with lemon peel and a cinnamon stick and flour, which must be added exactly as instructed in the recipe for the smoothest consistency. Beaten egg whites are folded in to create a pudding with loft.