Pour about 400 g of milk into a saucepan, put on a small fire and dilute sugar + vanilla in it, stirring. Bring to a boil. Dilute the starch in 100 g of cold milk, add the yolk (yolk if eggs are medium-sized) and gradually pour, stirring all the time, the yolk-starch mixture into a saucepan with milk and sugar.
Bring to a boil and, stirring, cook for 1-2 minutes. Remove from the stove. Add flavorings to taste (I had Amaretto syrup).
If you prefer pudding in frozen form - it is necessary to pour the hot mass over the molds washed with cold water. Cover with foil or film. Put it in the refrigerator.
Spicy is a wonderful "sauce" for sweet dishes, such as apple pies, etc.