Cut butter into pieces. Cut the vanilla pod in half lengthwise and scrape out the pulp with the back of a knife. Wash lemon hot, grate dry and thinly grate half of the peel. Sift icing sugar into a bowl. Knead butter, lemon zest, vanilla pulp, 2 egg yolks, salt, flour and starch first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Wrap the dough in foil and chill for about 1 hour.
Wash the orange hot, rub dry and rub half of the peel thinly. Heat quince jelly, almonds, honey, orange peel, coriander and rum in a pot. Let simmer for 1-2 minutes until a thick liquid mass is formed. Let the mixture cool down. Halve the dough and roll out 2-3 mm thinly on a floured work surface. Cut approx. 80 squares with wavy edges (approx. 4 x 4 cm) from the dough, kneading and rolling out the dough again and again. Place half of the squares on 2 baking trays lined with baking paper. Mix 1 egg yolk and milk. Put the quince filling in the middle of the biscuits lying on the baking tray, then brush the edge with egg-milk. Place a 2nd square on each and press on with the help of a smaller smooth square cutter. Spread the finished ravioli with egg-milk and sprinkle with decorative sugar.
Cut approx. 80 squares with wavy edges (approx. 4 x 4 cm) from the dough, kneading and rolling out the dough again and again. Place half of the squares on 2 baking trays lined with baking paper. Mix 1 egg yolk and milk. Put the quince filling in the middle of the biscuits lying on the baking tray, then brush the edge with egg-milk. Place a 2nd square on each and press on with the help of a smaller smooth square cutter. Spread the finished ravioli with egg-milk and sprinkle with decorative sugar. Bake the trays one after the other in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 15-18 minutes. Remove, place the cookies on a cake rack and let them cool down
waiting time approx. 1 1/2 hours