Skewered grilled fruit with minted yogurt honey sauce

For sauce:
12 oz (1 1/2 cups) nonfat plain yogurt
3 tablespoons honey
2 tablespoons fresh lime juice
3 tablespoons finely chopped fresh mint
For skewers:
4 firm-ripe plums, each cut into 8 wedges
4 firm-ripe peaches, peeled and each cut into 8 wedges
1/2 ripe pineapple (1 1/2 lb), peeled, cored, and cut into 1-inch pieces

1. Prepare grill for cooking.
2. Stir together yogurt, honey, lime juice, and mint in a small bowl and chill until ready to serve.
3. Thread about 4 pieces of fruit onto each skewer. When fire is medium-hot (you can hold your hand 5 inches above rack 3 to 4 seconds), grill fruit in batches on lightly oiled grill rack, turning once, until browned and slightly softened, about 5 minutes total. Serve fruit on skewers with sauce on the side.