Sweetened Summer Berries

4 cups raspberries

2 cups blueberries

2 cups blackberries

1/4 cup sugar

1/4 cup fresh lime juice

1/4 tsp salt

Combine all ingredients and gently stir until combined.  Let stand at room temperature, stirring occasionally, for at least 15 minutes and up tone hour.  Serve chilled or at room temperature.