I cut each slice of bread diagonally into 2 pieces.
For pasta, I used this kind of melted cheese. It has a very soft consistency. I mashed the whites with a fork and mixed them with cheese and chopped green onions. A little salt.
The resulting paste was spread on bread.
Top sprinkled with crushed egg yolk. Put on a teaspoon of caviar and garnish with slices of cucumber and radish.
I have cod roe. You can use any one, focusing on your taste and budget.