Wash and dry all the fruits. Quarter the apple. Peel it and remove the core. Slice each quarter in half lengthwise, then cut crosswise into medium-thick slices. Peel the kiwi and cut it in half lengthwise, then slice it crosswise. Peel the mandarin and separate it into segments.

Transfer all the prepared fruits to a bowl. Drizzle with lemon juice and add the yogurt. Mix well.

Transfer to a convenient dish.