Preheat oven to 150 lower for fan oven. Beat together eggs, sweetener, almond essence, vanilla essence and fromage frais until well mixed.
Halve and stone the cherries and scatter over the base of a large flan dish. Pour over the egg mixture and bake for 50-60 mins. When dish is cooked it should feel springy and have started to brown at the edges
Remove from oven and allow to cool completely before slicing and eatin