Berry Strawberry Parfait

• 1 package (10 ounces) frozen raspberries or strawberries in syrup, thawed
• 1/4 cup sugar
• 2 tablespoons cornstarch
• 2 cups sliced strawberries, 1 pint
• 2 teaspoons lemon juice
• 1 quart vanilla ice cream
• 1 cup sour cream
• fresh sliced strawberries and whipped cream, for garnish (optional)

Drain frozen raspberries or strawberries, reserving syrup. Add enough water to the syrup to make 1 cup liquid. In a small saucepan, combine sugar and cornstarch; stir in the reserved berry liquid. Add sliced fresh strawberries to mixture. Cook and stir over medium high heat until mixture thickens and boils. Remove from heat; stir in the thawed raspberries (or strawberries) and the lemon juice. Chill thoroughly. In parfait glasses, layer ice cream, berry sauce, sour cream, then more sauce. Repeat layers. Top with a scoop of ice cream and garnish with a small dollop of whipped cream and sliced fresh strawberries, as desired.