DRESSING:

3/4 c. mayonnaise
3/4 c. plain low-fat yogurt
1 1/2 tsp. curry powder
1/2 tsp. salt
2 1/2 lbs. sweet potatoes (about 7 med. sized), cooked, peeled, cooled, & cut into 3/4 inch chunks (5 1/2 cups)
2 med. sized Granny Smith apples, cut in 1/2 inch pieces
1 (20 oz.) can juice packed pineapple tidbits, drained
1/2 c. raisins

Whisk dressing ingredients in large bowl. Add potatoes, apples, pineapple and raisins. Toss gently to mix and coat. Cover and chill at least 1 hour for flavors to develop, or up to 3 days. Makes 8 cups.