Put a pot of water and salt on the fire until it starts to boil, add the broccoli flowers and blanch them for five minutes. Preheat the oven to 200ºC. ** Drain the broccoli carefully ** so that it does not break. Grease a baking dish with a little oil and place the broccoli all over the tray.
Put the bacon in small pieces in a bowl and cover it, fry it for a minute in the microwave on full power. Pour the pieces between the broccoli. Sprinkle a third of the grated cheese on top.
In a tall glass, add the eggs, flour, cream, milk, mustard, salt and pepper. Beat with the mixer until smooth. Add the rest of the cheese and mix. Pour this over the broccoli and bacon. Add the rest of the cheese so that the surface is gratinated. Bake for thirty minutes.