Prepare the Apples : Slice the red and green apples into matchstick pieces. Place them in a large mixing bowl and drizzle with lemon juice to prevent browning. Toss to coat evenly.

Combine the Vegetables and Fruit : Add the matchstick carrots, diced yellow onion, dried cranberries, and mandarin segments to the bowl with the apples. Mix gently to combine.

Make the Dressing : In a small bowl, whisk together the vanilla yogurt, mayonnaise, sugar, salt, and black pepper. Taste and adjust the seasoning if needed.

Toss the Salad : Pour the dressing over the apple and carrot mixture. Toss gently until all the ingredients are well-coated.

Chill and Serve : Cover the salad and refrigerate for at least 15 minutes before serving to allow the flavors to meld. Serve chilled as a side dish or a light snack.