Mix eggs and milk in a bowl to create egg mixture. Heat salad oil in a pan over medium heat, pour in the egg mixture, and stir with chopsticks until scrambled. Remove from heat.

Wash potatoes and wrap them loosely in plastic wrap while still damp. Microwave at 600W for about 5 minutes. Remove wrap and peel using a thick paper towel or damp cloth.

Mash the potatoes in a bowl with a fork, add the seasoning ingredients (mayonnaise, mustard, salt, pepper, cream cheese), and mix well. Add scrambled eggs and mix again. Divide into 6 portions and shape into balls using plastic wrap.