Meanwhile, in 1 1/2-quart saucepan, stir together 1/2 cup sugar and the cornstarch. Stir in orange juice until smooth. Stir in 1 cup berries; heat to boiling over medium heat, stirring constantly. Cook about 4 minutes, stirring constantly, until slightly thickened; remove from heat. Just before serving, stir in strawberry halves. Serve warm over French toast bake.