Thaw the puff pastry and place the slices 1 cm overlapping on the drip pan. Press on the overlaps. Pull the dough up a little at the edge. Prick the puff pastry several times with a fork.
Cover the dough base with slices of bacon first, then with slices of cheese. Beat egg milk from the remaining ingredients and pour over it.
Bake in a preheated oven (bottom / top heat) at 250 degrees for about 20 minutes. If the bacon cake gets too dark, cover with parchment or aluminum foil.