Huzar Lettuce

How to make : 1 . Soak cucumbers in water that has been mixed with vinegar and salt to taste about 15 minutes , drain . 2 . Soak apples in water that has been mixed with a pinch of salt about 15 minutes , drain . 3 . Sauce : Mix the egg yolks , salt , and pepper , beat until blended , then enter 1 teaspoon vegetable oil , shake to blend . 4 . Add another 1 teaspoon vegetable oil , shake again to blend , then add back 1 teaspoon vegetable oil , shake again , repeat continuously until the vegetable oil runs out . 5 . Add lemon juice , warm water , mustard , and sugar , stir well . 6 . Put all ingredients in a serving dish , then pour the sauce over it and serve .