Place chopped bacon in a pan, cook over medium heat until brown. Preheat the oven to 175 degrees. Lubricate a little cake pan.
Put bacon and cheese on the bottom of the mold. Mix eggs, butter, onions, salt, flour and milk, beat together until smooth. Pour the dough into a mold.
Bake quick quiche in a preheated oven for 35 minutes. You can add any vegetables of your choice.