Drain the cherries in a sieve, collecting the juice. Stir 3-4 tablespoons of juice and starch until smooth, bring the remaining juice to the boil in a saucepan. Gradually stir the starch into the pot. Simmer for 2-3 minutes.
Fold in the cherries and pour into a bowl. Mix vanillin sugar, crème fraîche, sour cream and eggs with a whisk until smooth. Halve the vanilla pod lengthwise, scrape out the pulp and add the pulp to the cream.
Carefully roast the almonds in a pan without fat and remove them. Cut the waffles diagonally in half and put them alternately with the stewed cherries in an ovenproof dish. Finally, carefully pour the egg mixture from the rim into the casserole dish and bake in a preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 15-20 minutes.
Remove from the oven and sprinkle with toasted flaked almonds and icing sugar.