Papas a la Huancaina

Name: Papas a la Huancaina
Ingredients: 1 cup cottage cheese; 3 hardboiled egg yolks; 2 teaspoons coarse salt; 1/2 teaspoon yellow Aji, or Tabasco; 2 tablespoons vegetable oil; Juice of 1 lemon; 2 tablespoons milk; 1/2 bunch scallions, white and light green parts only, chopped; Lettuce leaves for plates; 12 baby new potatoes, boiled and cut into 3/4 inch dice; 2 hardboiled eggs, sliced; 10 black olives