Roast the almonds until golden brown. Take out, let cool down. Rub the quinces, wash and halve them. Remove the seeds with a ball-cutter or small knife and hollow out a little. Sprinkle with lemon juice. Wash and drain the raisins. Mix almonds, up to 1/2 tablespoon, raisins and cinnamon
Grease the casserole dish. Place the quinces inside. Spread 1/4 teaspoon butter on each. Add almond mixture and remaining butter. Bake the quinces in the preheated oven (electric cooker: 175 °C/recirculating air: 150 °C/gas: level 2) for about 50 minutes until they are soft
Beat the egg whites and 1 pinch of salt until stiff, adding sugar. Spread the meringue on the quinces approx. 10 minutes before the end of the baking time and bake until done. Take out, let cool a little. Sprinkle with remaining almonds and dust with icing sugar