Sardine paste Jewish style


2 cans of sardines in a tomato sauce, 1 cup of onions (chopped up), 3 tablespoons of butter, 2 hard-boiled eggs, 1/2 cup of ground nuts, 1 teaspoon of salt, 1/4 teaspoon of pepper, a few leaves of lettuce.


Mix all ingredients together until the mixture resembles thin, smooth cream.