- 2 cups frozen unsweetened boysenberry, thawed
- 2 tablespoons sugar
- 3 cups chilled orange juice (do not use freshly squeezed)
- 1 1/2 cups frozen orange-peach-mango juice concentrate
- 1 750-ml bottle of chilled dry champagne
- 10 small orange slices
- Place 10 berries in freezer; reserve for garnish. Purée remaining berries in processor. Strain through sieve over bowl, pressing on solids. Mix in sugar. (Purée can be made 1 day ahead. Cover and refrigerate.)
- Whisk orange juice and concentrate in pitcher to blend. Mix in champagne. Divide mimosa among 10 champagne glasses. Drizzle 1 1/2 teaspoons berry purée over each. Garnish with orange slices and reserved berries.