With cold hands, quickly knead a shortcrust pastry from the flour, half a teaspoon of salt, an egg and the flakes of butter. Then cover with foil and refrigerate for at least 30 minutes.
In the meantime, mix the remaining ingredients into a smooth mixture. Grease the tart pan and sprinkle with breadcrumbs or line with baking paper.
Now roll out the dough, shape it and form a high edge. Spread the mixture on the dough and bake at 160 to 175 ° C for 40 to 55 minutes. Let the quiche rest for 10 to 15 minutes before serving. It tastes lukewarm, because that`s where the fragrance of annatto, which is slightly reminiscent of violets, can best unfold.