Cut the vegetables into small pieces, add grated or finely chopped ham, sweet corn and add the cooked pasta.
In a bowl, mix white yogurt, sour cream and mayonnaise, which should be seasoned with salt (the amount depends on your taste preferences, if you prefer it less heavy, add more white yogurt, if you like it more sour, add more sour cream).
Mix everything together, season with more salt if necessary and put in the refrigerator.