PEANUT BUTTER PINEAPPLE SHAKE

1 banana, cut into pieces
2 cups pineapple chunks
1 cup skim milk
3/4 cup plain lowfat yogurt
1/4 cup smooth peanut butter

Place banana pieces on a plate and freeze 40-50 minutes or until firm.

Combine pineapple and frozen banana pieces in a blender or food processor and process until smooth.

Add remaining ingredients and process until smooth.