1: Cook the sausage in a large pan of water for 30 to 40 minutes, depending on the size.
2: Slice, then cut into small pieces.
3: Melt a walnut-sized knob of butter in a large frying pan (ideally a pancake pan), once it is nice and hot. Note: this knob of butter underneath is important as it gives a shiny golden colour to the pancake and crisps it a little.
4: Place a galette in the pan and break an egg into the centre.
5: Use a wooden spatula, to spread the egg white over the surface of the pancake until it is cooked (becomes opaque), but leave the yolk alone, and - above all - don't break it.
6: Arrange the pieces of sausage around the yolk.
7: Sprinkle with grated cheese.
8: And fold the pancake over in half. Leave like this for around 2 minutes, just long enough for the cheese to melt.
9: Slide onto the serving plate...
10: ... and eat without delay. Make all the pancakes like this.
Remarks
This recipe can be varied in any number of ways: you can change the sausage, for example, for any other you like. Why not change the cheese for a goat's cheese? More unusual, but delicious!