Traditional Croatian raised cake with poppy seeds and walnuts (GIBANICA)

Name: Traditional Croatian raised cake with poppy seeds and walnuts (GIBANICA)
Prep time: 10 min
Cook time: 1 h 15 min
Total time: 1 h 25 min
Cuisine: European
Ingredients: Dough:; 50 grams white flour; 1 egg; 1 yolk; 60 grams sugar; 3 vanilin sugars; 1 deciliter milk; 1 yeast; pinch of salt; 1 deciliter oil; 10 grams butter; Fill:; 200 grams ground poppy seeds; 200 grams ground walnuts; 2 deciliter milk; 2 teaspoons rum(alcohol); 2 grated lemon zest; 200 grams sugar; 2 whites