Prepare the Apples:
Slice both the red and green apples into matchstick pieces. Place the apple pieces in a bowl, drizzle with lemon juice, and toss to coat evenly. Let the apples sit for about 5 minutes to absorb the lemon juice, which will help prevent browning.
Combine Main Ingredients:
In a large mixing bowl, add the matchstick carrots, diced onion, and dried cranberries.
Add the Apples:
After the apples have absorbed the lemon juice, add them to the bowl with the carrots, onion, and cranberries.
Make the Dressing:
Add the vanilla yogurt, mayonnaise, sugar, salt, and black pepper to the bowl. Stir all the ingredients together until everything is well coated in the creamy dressing.
Add Mandarin Oranges:
Gently fold in the drained mandarin segments, being careful not to break them up too much.
Chill:
Cover the bowl and refrigerate for at least 3 hours before serving to allow the flavors to meld together.
