For the short pastry, knead 250 g flour, 1 egg, 1 level teaspoon salt, almonds and 125 g butter in pieces, first with the dough hooks of the mixer, then briefly with your hands to form the smooth dough. Roll out to a round shape (approx. 32 cm Ø) on some flour and lay it on a greased tart tin with a lifting base or a springform pan (approx. 28 cm Ø).
Press lightly and prick several times with a fork. Chill for about 45 minutes.
Mix crème fraiche and 5 eggs. Season well with salt, pepper and nutmeg. Peel or clean and wash the carrots and zucchini. Use a slicing machine or a peeler to cut them lengthwise into thin slices.
Sprinkle short pastry with breadcrumbs. Starting from the middle, place carrot and zucchini slices alternately on the dough in a tight spiral. Pour the cream-fraîche mixture evenly on top.
Bake the quiche in a preheated oven (electric oven: 200 °C/circulating air: 175 °C/gas: see manufacturer) for approx. 1 hour on the lowest shelf. Remove from the oven and let rest for about 10 minutes. Then carefully remove from the mould.