Here's a quick, easy recipe for peanut butter dip that is not too sweet and tastes great with apples. A great any-time-of-day snack. I think it could also be a great spread in a sandwich--the yogurt "lightens" the peanut butter and makes it more spreadable. I use Zimmerman's Natural peanut butter which has no sugar and just a little salt.
Peanut Butter Dip
1/2 cup plain (or vanilla) yogurt
1/4 cup peanut butter
2 TBSP sugar (or less if using sweetened yogurt or peanut butter)
splash of vanilla
Whip ingredients together in a bowl until incorporated and fluffy. Dip!