Cut the loaf into 6 pieces, 1.5 cm thick. Remove the crumb from the middle. Fry the slices in vegetable oil until golden brown.
Melt the butter. Add flour, mix well. Add broth. Then add sour cream, bring to a boil. Pour the sauce into the mold.
Put slices of loaf. In the middle of the pieces, break the eggs, salt.
Put the “Surprise” sandwich in the oven. Bake at 180 degrees for 25 minutes.