Heat the milk, cream and almond paste in a saucepan. In a bowl, beat together the egg yolks and sugar. When warm, add a quarter of the cream mixture to the egg mixture, and thoroughly incorporate. When the cream mixture boils, pour it over the egg mixture, beating continuously.
Sieve the mixture into a clean saucepan, and cook gently until it will coat the back of a spoon. Cool, then fr