Peel and chop the onion. Cut the bacon into 1 cm cubes. Cut the chicken fillet into 1.5 cm cubes. Put the bacon in a pan, put on medium heat, fat. Add onion and chicken, sauté, stirring, 10 minutes. Remove from heat, salt, pepper and set aside.
Preheat oven to 200'C. Whisk eggs with cream, salt and pepper until smooth.
Roll out the whole sheet of dough or cut it into 4 parts, for portion molds. Place the dough in one deep pan or in 4 individual baking pans so that the sides are closed. Prick the dough often with a fork.
Spread chicken with bacon and onions on the dough, pour over the egg mixture, garnish with cherry halves.
Bake the quiche in the center of the oven until the dough and filling are done, about 30 minutes. Serve hot or chilled.