Sauerkraut cut into thin strips, then put in a salad bowl. Tuna cut into in small pieces and so added to the cabbage. Kernels are placed in a Teflon pan. Sprinkle salt and 1 tbsp water, then place the pan of hot stove. The walnuts are roasted for 5-10 minutes, and then crushed. In a bowl, pour the mayonnaise, olive oil, yogurt and a pinch of white pepper. The ingredients to be broken down with a stirrer, and then pour the salad. Top to scatter chopped walnuts and corn kernels. Mix and leave for 30 minutes before serving.