Quiche without tomatoes salmon butter

1 tablespoon vegetable oil 1 pound fresh asparagus, trimmed and cut into 1/2-inch pieces 1 pinch salt 4 slices Canadian bacon, cut into 1/2-inch dice 3[...]

1 tablespoon butter 2 stalks celery , peeled, trimmed and cut into small dice 2 slender leeks , white and light green parts only, trimmed, quartered[...]

250 g puff pastry 750 g mushrooms (chanterelles or other mushrooms such as porcini, button, ...) 1 red onion (medium sized, minced) 2 -3 garlic cloves (to[...]