Banana Cream Smoothies

2 medium ripe bananas, peeled and sliced

1 can (8 oz) unsweetened crushed pineapple

1/2 cup unsweetened frozen raspberries

1 cup fat free plain yogurt

IN a blender, combine all ingredients, cover and process for 30 seconds or until smooth.  Stir if necessary.  Pour into chilled glasses and serve immediately.