Passion Fruit Frozen Yogurt

1/2 cup low-fat milk
1 teaspoon unflavored gelatin
5 passion fruit
3/4 cup sugar
1 teaspoon lemon juice
1 1/2 cups plain low-fat yogurt — stirred
1 egg white
1/3 cup water
1/3 cup nonfat dry milk

In small saucepan, combine milk and gelatin; let stand 1 minute. Cook and
stir over low heat until gelatin dissolves; set aside. Cut each passion
fruit in half crosswise; scoop out pulp and seeds. Discard shell. In
blender or food processor fitted with metal blade, puree pulp and seeds.
Strain; discard seeds. Combine passion fruit juice with sugar, lemon juice
and dissolved gelatin. Stir in yogurt. In medium bowl, combine egg white,
water and nonfat dry milk. Beat until stiff but not dry. Fold into yogurt
mixture. Freeze in ice-cream maker according to manufacturer’s directions; or follow refrigerator-freezer instructions. Makes about 1 quart.