Wash and possibly hull the spinach. Drain them well. Peel and slice the onion.
Heat a little olive oil (or butter) in a pan.
Brown the onion for 5 minutes then add the spinach. Leave for 5 - 10 minutes until the spinach has released its water. If they have released a lot of water, drain.
Prepare the salmon
Remove the fishbones and skin (slide the blade of a knife between the skin and the flesh).
Cut cubes of +/- 2 cm in diameter
Prepare the quiche batter
Whisk the eggs with the cream and milk. Salt, pepper and add a little nutmeg.
Add the drained spinach and mix.
Finalize the quiche
Roll out the shortcrust crust.
Arrange half of the salmon pieces here and there on the dough.
Pour the egg – cream – milk – spinach mixture over it.
Then place the remaining pieces of salmon lightly in the batter.
Bake
Sprinkle with parmesan and bake.
Remove from the oven after 40 to 45 minutes and serve.
Notes
See all information in the article. You can use frozen spinach. Just defrost them without frying them. Drain them well.