Separate eggs. Refrigerate the egg whites. Whisk egg yolk and sugar. Add milk, flour and salt and mix everything to a smooth dough. Let it swell for about 30 minutes. Drain the cherries on a sieve, collecting the juice.
Stir starch and 2 tablespoons of cherry juice until smooth. Boil up the rest of the juice, lemon peel and vanilla sugar in a small pot. Stir in the mixed starch and bring to the boil briefly. Remove lemon peel. Fold in the cherries. Let the compote cool down
Beat the egg white until stiff and fold into the dough. Heat the fat in portions in a small coated pan. Add 1/4 of the dough, bake until golden brown and turn. Then tear into pieces with two forks and finish baking.
Process the rest of the dough in the same way. Serve with some compote. Dust with icing sugar. Serve the rest of the compote separately