Preheat your oven to 180°C.
Cook the potato in water and then peel it.
Chop the half onion and sweat it in a pan with a little butter. Set aside.
Cook the bacon slice.
On top of thefirst cracker, place a generous layer of grated cheese and cooked bacon.
On the2nd cracker, place the sliced potato and onion and cover with the slice of raclette cheese.
Place your two crackers on a sheet of baking paper and bake for 8 minutes.
In the meantime, arrange the3rd cracker with a generous layer of fresh cheese and a nice slice of smoked salmon. Season with capers and a dash of lemon juice.
When your crackers are hot and crisp, arrange them on a plate and sprinkle with a few fresh basil leaves. Serve immediately.