Cake "NAPOLEON" very tender | English subtitles

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Recipe:
Margarine 200 g
Flour 350 g
(but it may take more than 400 g)
Sour cream 200 g
1 egg
Sugar 1 tbsp
Soda 0.5 tsp
Pinch of salt
Cheese 100 g
4 eggs
Sardine 1 can (or any canned fish at your taste)
Mayonnaise to your taste I used 300 g
Dry garlic to taste