Mix the flour with yeast, sugar and milk to form a smooth dough. Cover and let rise for 30 minutes. Add the oat flakes and salt, knead. Let rise for another 30 minutes. Form small balls, place on a greased tray to form a wreath, leave to rest for 20-30 minutes. Brush with milk and sprinkle with caraway seeds, poppy seeds, sesame seeds and crispy oat flakes. Bake in the preheated oven at 220 ° C on the middle shelf.