Crush the rusks with a rolling pin, then mix it with 2 tablespoons sugar and butter. Knead the mixture by hand, then spread it on a buttered pan. Mix the cheese with the sugar, the zest and lemon juice and add 1 egg yolk. Whip the egg white and add it to the cream. Top the mixture on the crushed rusks and bake for 75 and coat it with strawberry jam.