Fill a champagne flute ⅓ full with cranberry juice. Add 1 tablespoon Grand Marnier. Fill the remaining glass with champagne. Garnish with some cranberries and rosemary.
Notes
If you don't like a strong mimosa, pour the cranberry juice halfway instead of a third in the glass.
Make sure your cranberry juice and champagne is chilled.
If you want the drink a little sweeter, just stir in a bit of honey.
Add some sparkling sugar for garnish on the glass rims.