Tomato And Sardine Salad
["4 tomatoes", "1 small can sardines", "lettuce", "2 tsp. lemon juice", "1 hard-boiled egg yolk", "1 medium onion, sliced"]
["Peel tomatoes and cut into slices. Chill. Drain oil from sardines. Remove skin and backbone. Arrange lettuce on a salad plate. Place tomato on it; cover with sardine, onion and lemon juice. Garnish with egg yolk which has been pressed through a sieve. Serves 6."]
["tomatoes", "sardines", "lemon juice", "egg yolk", "onion"]