1 (8oz) container lowfat or fat free plain yogurt
about 1/4 c brown sugar
1/2 tsp vanilla
apples--I recommend a variety (Granny Smith, Gala, Pink Lady, etc.)
In a small mixing bowl, stir yogurt until smooth with a whisk. Sprinkle brown sugar on top. Cover with plastic wrap and allow it to sit for a few hours in the refrigerator. (You can do this in the morning and then make the salad later in the day or make it before you go to bed and make the salad the next day.) When the yogurt sauce starts looking...well...rather gross and separated, it's ready.
Whisk the brown sugar into the yogurt until very smooth. Whisk in vanilla. Dice apples and toss with some of the yogurt sauce. Serve immediately or keep chilled till ready to serve.