Line a baking sheet with foil and spray with cooking oil spray. Place berries on foil, in a single layer, close together. Roast at 400 for 20 minutes.
Place roasted berries in a sauce pan with remaining ingredients. Bring to a boil, then lower heat and simmer for 15 minutes.
Remove from heat and use an immersion blender or transfer to a food processor or blender, being careful not to overfill blender. Puree into desired smoothness. Makes 2 cups sauce